Mayoralty of Michael Bloomberg

The mayoral tenure of Michael Bloomberg commenced on January 1, 2002, when Michael Bloomberg was sworn in as the 108th mayor of New York City, concluding on December 31, 2013.

Recognized as a pragmatic politician, Bloomberg's leadership style was heavily influenced by his background in the private sector. He employed a data-driven methodology in governing the city, selecting commissioners based on their professional qualifications and granting them significant independence. Departing from a nearly two-century-old custom, he introduced an open-office "bullpen" layout reminiscent of a Wall Street trading room to enhance transparency and approachability. Upon completing his three terms, The New York Times observed that New York had transformed into a vibrant metropolis with reduced crime rates, enhanced public transportation, and a cleaner environment.

2001 election

With incumbent Rudy Giuliani barred from seeking another term due to term limits in 2001, numerous candidates vied to replace him. Bloomberg, traditionally a Democrat, ran under the Republican banner.

The primary elections were initially scheduled for September 11, 2001, but were postponed following the terrorist attacks. In the rescheduled Republican primary, Bloomberg defeated former Congressman Herman Badillo to claim the party’s nomination. On the Democratic side, Public Advocate Mark Green secured the nomination after a runoff election.

In the general election campaign, Bloomberg benefited from Giuliani’s endorsement and held a substantial financial edge. He personally contributed $73 million to his campaign budget, outspending Green by a factor of five. His platform highlighted his business acumen as essential for steering New York City's economic recovery after the attacks.

Bloomberg appeared on both the Republican and Independence Party ballots; under New York’s fusion voting system, votes cast across multiple party lines were aggregated. Additionally, he established an independent ballot line called Students First. Ultimately, Bloomberg won with 50% of the vote compared to Green’s 48%.

His victory marked the first time in New York City history that Republicans held consecutive mayoralties. Although nominated by the Republican Party, Bloomberg is regarded as socially progressive—supporting abortion rights, endorsing same-sex marriage legalization, and advocating for more stringent gun control measures.

In 2002, Bloomberg successfully secured New York City as the host for both major political parties' nominating conventions for the 2004 presidential election. The city was chosen to hold the Republican National Convention; this event saw thousands of protesters opposing the Iraq War and other causes. The NYPD arrested roughly 1,800 demonstrators, though most charges were eventually dropped.

2005 election

Bloomberg won re-election in November 2005 by a margin of 20 percentage points—the largest margin ever achieved by a Republican mayor in New York City.

By late October 2005, Bloomberg had invested $102 million into his campaign efforts. Around late 2004 or early 2005, he contributed $250,000 to the Independence Party of New York to support a phone bank aimed at recruiting volunteers for his re-election bid.

Former Bronx Borough President Fernando Ferrer earned the Democratic nomination to challenge Bloomberg. Thomas Ognibene sought to contest Bloomberg in the Republican primary but was disqualified after Bloomberg’s campaign successfully challenged his petition signatures. Ognibene then ran on the Conservative Party ticket, accusing Bloomberg of abandoning core Republican values—a criticism echoed by others.

Bloomberg publicly opposed confirmation of John Roberts as Chief Justice of the United States, expressing doubts about Roberts’ dedication to upholding Roe v. Wade. Despite his Republican affiliation, Bloomberg is an outspoken advocate for abortion rights.

In addition to Republican support, Bloomberg received endorsements from notable Democrats such as former Mayor Ed Koch, ex-Governor Hugh Carey, former City Council Speakers Peter Vallone and his son Peter Vallone, Jr., former Congressman Floyd Flake, and Brooklyn Borough President Marty Markowitz.

2009 election

On October 2, 2008, Bloomberg declared his plan to seek a third term as mayor by advocating for an amendment to New York City's term limits law. He justified this decision by highlighting the necessity for seasoned leadership amid the 2008 financial crisis. Bloomberg remarked, "Navigating this financial crisis while reinforcing vital city services is a challenge I am prepared to undertake." To secure backing, he offered Ronald Lauder—who drafted the original 1993 term limits law and contributed over $4 million to establish an eight-year mayoral cap—a position on a powerful city board; Lauder consented to support Bloomberg's third-term campaign.^[1] Subsequently, on October 23, 2008, the City Council approved the extension of term limits to three consecutive four-year terms by a 29–22 vote, paving the way for Bloomberg's candidacy. Following public consultation, Bloomberg enacted the legislation on November 3.^[2]

The move sparked resistance from civil rights advocates such as former New York Civil Liberties Union Director Norman Siegel and political figures including State Senator Eric Adams.^[3]

Bloomberg's primary challenger was Bill Thompson, representing the Democratic and Working Families parties, who had previously served as New York City Comptroller and Board of Education President. Bloomberg prevailed with 50.6% of the votes compared to Thompson’s 46.0%.^[4]

In January 2010, campaign finance disclosures revealed that Bloomberg personally contributed two payments of $600,000 each to the Independence Party during the election cycle. The party subsequently disbursed $750,000 to Republican strategist John Haggerty Jr.^[5] This transaction led to an inquiry by New York County District Attorney Cyrus Vance Jr. in February 2010 concerning possible financial misconduct.^[6] The Independence Party raised concerns about Haggerty’s allocation of funds intended for poll-watching activities.^[7] Former State Senator Martin Connor contended that Bloomberg’s contributions breached campaign finance regulations because they were directed into a housekeeping account rather than active campaign accounts.^[8] Additionally, Haggerty utilized another $200,000 donation from Bloomberg to cover office expenses.^[9] In 2011, Haggerty was found guilty of misappropriating campaign funds from Bloomberg’s campaign; he pled guilty and received a prison sentence ranging from one year and four months to four years.^[10]

2013 election endorsements

On September 13, 2013, Bloomberg declared that he would refrain from endorsing any candidates vying to succeed him as mayor of New York City. During his radio program, he explained, "I do not wish to complicate matters for the incoming mayor," underscoring his desire for a seamless transition that would preserve and build upon his administration’s achievements.

Prior to this announcement, in an interview with New York magazine, Bloomberg expressed approval of the New York Times endorsements favoring Christine Quinn and Joe Lhota as leading contenders in the Democratic and Republican primaries respectively. Quinn ultimately placed third in the Democratic primary while Lhota secured the Republican nomination.

Earlier that month, Bloomberg attracted criticism for comments regarding Democratic candidate Bill de Blasio's campaign approach. Initially labeling de Blasio's tactics as "racist" during an interview, Bloomberg later clarified that de Blasio was appealing strategically to his voter base through family-oriented messaging—a method akin to targeting specific audiences—rather than engaging in personal racism.

Public perception

During 2006 and 2007, Bloomberg consistently enjoyed approval ratings exceeding 70%, with minimal variation across Republican, Democratic, and independent voter groups. Maurice Carroll, director of Quinnipiac polling, observed that New Yorkers appreciated Bloomberg’s candid, business-oriented style of leadership.

By August 2010, his approval had dropped to 49% from 56% in April, with support from 47% of Democrats and 55% of Republicans. Lee Miringoff of Marist College attributed this decline to the economic downturn and Bloomberg’s endorsement of the controversial Islamic center near Ground Zero.

A Public Policy Polling survey in November 2010 revealed that only 19% of registered voters viewed Bloomberg favorably, while 38% held a negative opinion. Five months before leaving office, a New York Times poll indicated a 49% approval rate compared to 40% disapproval. Later, in January 2014, Quinnipiac found that 64% of respondents regarded Bloomberg’s twelve-year mayoralty as "mainly successful."

Technology

Bloomberg placed a strong emphasis on technology to improve the efficiency, responsiveness, and transparency of New York City government operations. A central project was unifying the city’s numerous agency phone numbers into a single memorable three-digit line: 3–1–1. He involved his daughter, Emma Bloomberg, in close collaboration with the Department of Information Technology and Telecommunications to expedite this rollout. Despite initial doubts, the 311 system debuted in 2003 and became a signature achievement of Bloomberg’s administration, handling its 50 millionth call by 2007 and reaching 100 million calls by 2010.

Another significant technological initiative was the development of NYC Media. Utilizing franchise agreements with cable providers Cablevision and Time Warner Cable, Bloomberg directed aides Seth Unger and Arick Wierson to revitalize the city’s underused cable channels. Launched in 2003 as NYC TV, the network shifted focus toward local lifestyle content, events, parks, history, and culture rather than standard government programming. Although initially criticized for emphasizing ratings, NYC TV gained popularity through coverage of fashion and the arts. It incorporated broadcaster WNYE-TV and grew into the region’s largest local broadcast network under the NYC Media brand, featuring one full-power station, four cable channels, and an FM radio station. In 2006, WNBC syndicated more than 100 hours of NYC TV content. The network earned several New York Emmys, with series like "Secrets of New York" distributed nationally on PBS and other outlets. In 2009, Bloomberg announced that NYC Media President Arick Wierson would step down and appointed Film Commissioner Katherine Oliver as his replacement.

Transportation

Bloomberg was known to frequently use the New York City Subway, particularly for commuting between his residence and office at City Hall. According to a 2007 report by The New York Times, he was often driven by two New York Police Department SUVs to an express train station to avoid transfers on the IRT Lexington Avenue Line. He championed major transit initiatives such as the 7 Subway Extension and the Second Avenue Subway, ceremonially riding the newly opened 34th Street station in 2013—an important milestone associated with his mayoral tenure.

Preservation and development

Bloomberg advocated for extensive urban revitalization projects on underutilized sites, including initiatives like Atlantic Yards, the Hudson Yards Redevelopment Project, and the rezoning plan for Harlem. He supported efforts to retain much of Admiral's Row amid redevelopment activities. Regarding historic preservation, Bloomberg established or expanded more than 40 historic districts and vetoed a City Council decision to revoke landmark status from the Austin, Nichols and Company Warehouse, a stance lauded by architectural experts, though his veto was eventually overturned by the Council.

Economy

Identifying as a fiscal conservative, Bloomberg is credited with converting New York City's $6 billion deficit into a $3 billion surplus. However, conservative political action committee Club for Growth criticized his increases in property taxes and overall expenditure growth.

While expressing a general aversion to taxation, Bloomberg acknowledged their essential role in funding public services. During his tenure as mayor, he raised property taxes to finance budgetary priorities but proposed a 5% reduction in property taxes along with sales tax cuts in 2007, attributing these measures to robust Wall Street earnings and a strong real estate market.

His fiscal conservatism was demonstrated by eliminating the city’s $6 billion deficit through a combination of higher property taxes and reductions in agency budgets. In 2004, his administration introduced a $400 property tax rebate designed to offset earlier increases and assist in balancing the budget.

In the aftermath of 9/11, Bloomberg collaborated with Governor George Pataki to secure Goldman Sachs’ headquarters near Ground Zero by offering $1.65 billion in tax incentives, underscoring New York City’s attractiveness as a financial center.

During threatened transit strikes in 2002, Bloomberg showcased alternative commuting methods by cycling across the city. A three-day transit strike in 2005 concluded after difficult negotiations, drawing mixed assessments of his management.

A firm supporter of free trade and critic of protectionism, Bloomberg cautioned against the challenges posed by global competition, particularly from China, urging proactive economic strategies.

He championed public health initiatives addressing HIV, diabetes, and hypertension through progressive policies. His administration enacted a successful 2003 ban on smoking in indoor workplaces—later widely adopted—and bolstered the New York City Health and Hospitals Corporation by integrating information technology and electronic health records to improve healthcare delivery.

Bloomberg launched Opportunity NYC, the nation’s first pilot program for conditional cash transfers aimed at disrupting poverty cycles. Additionally, he rolled out a $7.5 billion affordable housing initiative—the largest in the country—targeting accommodations for 500,000 residents.

Concerned about poverty and increasing economic disparities, Bloomberg warned that expanding income inequality poses risks to social advancement.

Environment

As mayor, Bloomberg took an active role in environmental stewardship. On April 22, 2007, he introduced PLANYC, an ambitious plan designed to improve New York City’s environmental sustainability by 2030. By May that year, he announced that all city medallion taxis would be converted to hybrid vehicles by 2012.

PLANYC’s approach included implementing congestion pricing on traffic—a system inspired by London and Singapore—to reduce pollution and congestion while generating revenue for the city. Bloomberg also pledged to plant one million trees to enhance air quality and increase real estate values.

Under DEP Commissioner Christopher O. Ward’s leadership, key programs were advanced such as the Long Island Sound Nitrogen Reduction Program, federal endorsement of the Filtration Avoidance Agreement protecting upstate reservoirs, and completion of Manhattan’s portion of the third water tunnel.

By 2012, New York City achieved its cleanest air quality levels in half a century under Bloomberg’s guidance.

To combat climate change, Bloomberg developed PlaNYC: A Greener, Greater New York, focusing on lowering emissions, promoting cleaner fuels, and expanding public transit infrastructure to accommodate population growth. He also influenced global urban environmental efforts through leadership at the C40 Large Cities Climate Summit advocating decisive climate policies. Nonetheless, some proposals like congestion pricing south of 60th Street were rejected by lawmakers.

In 2013, Bloomberg advocated for banning Styrofoam food containers and increasing recycling rates for plastics and organic waste. He also endorsed environmentally friendly enterprises such as Neapolitan Express’s compressed natural gas-powered food truck that produces 75% fewer greenhouse gas emissions compared to traditional trucks.

Marriage Equality

Bloomberg endorsed the legalization of same-sex marriage in New York, although he challenged a judicial decision that restricted same-sex marriage rights within the state. He expressed, "Personally, I believe anyone should have the freedom to marry anyone... The issue for the city is preventing individuals from obtaining a marriage license only to later discover it holds no legal validity."

Immigration

As an advocate for immigration reform, Bloomberg emphasized the need to safeguard undocumented immigrants, a substantial population in New York City. He highlighted that deportations fracture families and discourage cooperation with law enforcement as well as access to essential social programs. Supporting legislative efforts led by Senators Ted Kennedy and John McCain, he promoted the regularization of status for undocumented immigrants who comply with the law. Bloomberg also criticized stringent border control measures as ineffective, remarking during a 2006 Senate hearing that expecting border agents to halt migration overlooks underlying economic and human dynamics.

In 2003, he enacted Executive Order 41, instructing municipal employees not to inquire about or reveal immigration status unless legally mandated or pertinent to their responsibilities.

Crime

The decline in crime rates initiated under Mayor Rudy Giuliani persisted throughout Bloomberg's administration, albeit with a more subdued approach compared to Giuliani’s frequently contentious tactics. Some detractors contend that crime data was manipulated to overstate reductions. According to Salon.com, Bloomberg retained certain elements of Giuliani’s policing model while significantly toning down confrontational rhetoric.

Bloomberg attracted criticism for endorsing the NYPD's contentious stop-and-frisk policy, which was accused of disproportionately targeting African American and Latino communities. He defended the practice by noting these groups are statistically more involved in violent offenses. In a 2013 interview, he claimed minorities were actually subjected to stops "too infrequently," focusing on crime trends rather than racial bias.

In February 2020, leaked recordings from a 2015 Aspen Institute gathering revealed Bloomberg defending stop-and-frisk by emphasizing that most homicide victims were young minority males and advocating for increased police presence in neighborhoods with concentrated crime. He acknowledged the program’s adverse effects on minority youth but justified it as essential for curbing gun-related violence.

Counterterrorism

Beginning in 2003, Bloomberg pushed for federal homeland security funding allocations to be based on cities’ risk profiles and population sizes, arguing against indiscriminate distribution of resources. In 2008, alongside Police Commissioner Raymond Kelly, he launched the Lower Manhattan Security Initiative—a surveillance system designed to identify terrorist threats. This program deployed over 3,000 security cameras and 100 automatic license plate readers throughout Lower Manhattan to bolster threat monitoring.

Surveillance Without Warrants Targeting Muslims

Following the events of September 11, Bloomberg’s administration, collaborating with the CIA, launched a contentious "suspicionless domestic surveillance" initiative via the NYPD, which specifically targeted Muslim populations based on their religion, ethnicity, and language. An eight-member NYPD team conducted surveillance on schools, bookstores, cafes, restaurants, nightclubs, and every mosque within a 100-mile radius of New York City, employing undercover officers and informants. This program came to public attention in 2011 through Pulitzer Prize-winning investigative reports and was ultimately terminated in 2014.

Gun control

Bloomberg has consistently championed gun control, making it a central theme during his second inauguration speech. Nevertheless, by 2006, numerous Congressional candidates receiving his financial support opposed gun control measures, often earning favorable ratings ("A" to "B+") from organizations such as the National Rifle Association of America and Gun Owners of America.

He remarked, "I don't understand why individuals carry guns. Guns kill people," and co-established the Mayors Against Illegal Guns Coalition, which brought together 210 mayors committed to reducing illegal firearms among criminals.

In 2006, Bloomberg launched sting operations aimed at gun retailers outside New York City, deploying city-funded private investigators to attempt illegal handgun acquisitions (commonly referred to as "straw purchase"). He pursued civil litigation against stores that resisted intense oversight by New York City officials. These actions provoked significant opposition in the targeted states and triggered a Bureau of Alcohol Tobacco and Firearms inquiry into possible breaches of federal law. Several Second Amendment advocacy organizations condemned Bloomberg’s approach as "vigilante." For instance, the Virginia Citizen's Defense League organized a "Bloomberg Gun Giveaway" raffle to stimulate sales at affected outlets. This move was particularly contentious following the Virginia Tech shooting. In response, Virginia enacted legislation banning simulated straw purchases and formally expressed its disapproval to Bloomberg.

Tax and fiscal policies

Confronted with a severe budget crisis after the September 11, 2001 attacks, Bloomberg implemented a $3 billion tax hike midway through fiscal year 2003 while simultaneously reducing expenditures. This strategy helped stabilize New York City's finances, though some critics contended that focusing exclusively on spending cuts would have been preferable.

The city recorded unprecedented surpluses in 2004 and 2005; however, concerns about unfunded pension obligations remained. In 2006, Bloomberg allocated $2 billion to establish a health fund for city retirees. Critics argued this move postponed necessary payroll reductions that they believed would have offered a more sustainable fiscal path given the city's already high tax burden. By 2013, according to the New York City Independent Budget Office, the administration had cut approximately 10,000 municipal jobs.

In August 2010, Bloomberg stirred controversy with comments regarding unpaid cigarette taxes on Indian reservations in New York State, suggesting enforcement be carried out with a "cowboy hat and a shotgun." These remarks drew criticism from the Seneca Nation of Indians, the National Congress of American Indians, and the Oneida Nation, who staged protests at New York City Hall. Bloomberg’s office maintained that tribal entities must "obey the law" and declined to issue an apology for his statements.

Housing

From 2003 to 2006, rental prices in New York City increased at a pace exceeding inflation, while inflation-adjusted incomes declined, as reported by New York University. During this timeframe, low- and moderate-income residents allocated larger portions of their earnings toward housing costs. Notably, the availability of affordable units for households earning 42% or less of the median income decreased by 205,000. Between 2002 and 2005, families with low incomes residing in private-market housing devoted an average of 43.9% of their income to rent.

Under Mayor Bloomberg's leadership, city investments in affordable housing were significantly expanded, resulting in the creation and preservation of roughly 160,000 affordable residences through the implementation of the New Housing Marketplace Plan.

Commission on LGBTQ+ Homeless Youth

In 2010, a group comprising 24 leaders was convened to advise the Mayor’s office regarding homelessness among LGBTQ+ youth. This commission presented ten recommendations emphasizing family reunification, recognition of alternative family structures, enhancement of LGBTQ+ health services, and improved coordination among LGBTQ+ support organizations. Their objective was to bolster social services, public health initiatives, and collaborative efforts to better serve homeless LGBTQ+ young people.

Development

Following the events of September 11, Mayor Bloomberg and Deputy Mayor Daniel L. Doctoroff spearheaded New York City’s economic recovery through a comprehensive strategy encompassing all five boroughs. Their approach prioritized economic diversification, fostering a business-friendly environment, and improving quality of life, which collectively contributed to record-breaking levels in employment, tourism, population growth, and housing development by 2005.

A prominent accomplishment included the revitalization of Brooklyn Bridge Park, supported by a sustainable financing framework that enabled projects such as the adaptive reuse of Empire Stores in DUMBO. The redevelopment contract for these historic warehouses was awarded to Midtown Equities in partnership with Rockwood Capital and HK Organization, with Studio V Architecture responsible for design.

Poverty

During his second term, Bloomberg placed a strong focus on poverty alleviation by establishing a Commission on Economic Opportunity in 2006 tasked with formulating innovative solutions. Although the overall poverty rate in the city remained steady at approximately 19% since 2001, significant income inequality persisted—Manhattan’s highest earners averaged $330,244 annually compared to $8,019 for the lowest quintile. Bronx County was identified as the nation’s second poorest urban county, while Kings County (Brooklyn) also exhibited low per capita income levels.

Latino residents experienced the highest poverty rates at 29%, despite comprising 28% of New York City's population but accounting for 42% of those living in poverty. The commission faced criticism for insufficient Latino representation and for not adequately addressing ongoing poverty within that community.

The commission’s 2006 publication, Increasing Opportunity and Reducing Poverty in New York City, prioritized interventions targeting very young children, young adults, and the working poor to effectively reduce poverty. Critics contended that this focus excluded other vulnerable groups such as seniors and homeless individuals. The report emphasized administrative reforms rather than new expenditures, advocating cost-neutral strategies like expanding federally funded food assistance programs.

In 2011, Bloomberg encountered opposition over a budget plan proposing closure of 110 daycare centers. Nevertheless, by 2013 he received commendation from the Children's Aid Society for his anti-poverty initiatives. Between 2000 and 2013—during which national poverty increased by 28%—New York City maintained a stable poverty rate, distinguishing it as the only major U.S. city to achieve this outcome during that period.

Education

Following his election, Bloomberg gained control over New York City's public education system by convincing the state legislature to grant the mayor direct oversight. Before 2002, management of the city's schools was divided among a seven-member Board of Education—with only two members appointed by the mayor—and 25 localized school boards, which significantly limited mayoral influence. Bloomberg consolidated these into a single Department of Education.

He named Joel Klein as Schools Chancellor to head this newly centralized department, based in the refurbished Tweed Courthouse. Under their joint leadership, graduation rates and standardized test scores showed improvement, and the city secured an increased portion of state education funding. Bloomberg rejected social promotion policies, instead supporting after-school and summer programs designed to assist students in catching up rather than advancing those who were unprepared. Although relations with teachers' unions were often strained, he successfully avoided strikes by negotiating contracts that provided an average 15% salary increase for teachers in exchange for concessions and productivity improvements; overall teacher pay rose by 43%.

Additionally, Bloomberg implemented a stringent ban on cell phone use in schools to minimize distractions during class time, mirroring similar policies in other major urban areas. This ban faced opposition from some parents concerned about communication accessibility.

By May 2007, the four-year high school graduation rate had climbed to 60%, marking an 18% rise since Bloomberg assumed control in 2002—the highest recorded since data collection began in 1986.

Although mayoral control briefly expired in mid-2009 when the New York State Senate declined to renew it, it was reinstated within two months with slight modifications, effectively restoring comprehensive mayoral authority over the school system.

Health

Bloomberg contributed millions to the Johns Hopkins Bloomberg School of Public Health and appointed Dr. Thomas R. Frieden as Health Commissioner. Under Frieden’s guidance, the New York City Department of Health prioritized combating HIV, diabetes, and hypertension.

He expanded New York City's smoking ban to encompass all commercial venues—including bars and nightclubs—eliminating designated indoor smoking areas. This regulation took effect in March 2003 and remains in force today. It was widely regarded as pioneering and influenced similar smoking prohibitions throughout North America and Europe.

In June 2005, Bloomberg enacted the Potty Parity law mandating increased numbers of women’s restrooms in new public establishments such as bars, theaters, and stadiums.

On December 5, 2006, New York City became the first U.S. municipality to prohibit trans-fat in all restaurants, with the ban effective from July 2008.

In January 2010, his administration introduced a strategy aimed at reducing salt content in packaged foods and meals served at restaurants by 25% by the year 2015.

In May 2012, Bloomberg proposed restricting sugary soft drink sales to a maximum size of 16 ounces (473 ml) at venues and street vendors. This initiative drew criticism accusing it of fostering Big Government overreach and creating a "nanny state." On March 11, 2013, a judge blocked the policy on grounds that the health board lacked jurisdiction to regulate legal products as a chronic disease prevention measure. An appellate court unanimously upheld this ruling on July 30.

On March 18, 2013, Bloomberg introduced the "Tobacco Product Display Bill," designed to keep cigarette packages out of customers’ direct line of sight within stores.

Backing congressional candidates

Since the year 2000, Bloomberg has financially supported a variety of United States Congress hopefuls from both major political parties. At the Democratic National Convention in July 2016, he publicly endorsed former Secretary of State Hillary Clinton. In June 2018, he pledged $80 million to aid Democratic contenders striving to reclaim control of Congress during the midterm elections.

2004 Republican National Convention

While Bloomberg served as mayor, New York City was the venue for the 2004 Republican National Convention, despite considerable opposition from many residents in a city that predominantly leans Democratic. At this event, Bloomberg expressed his support for then-President George W. Bush.

His handling of protest activities drew criticism when nearly 2,000 demonstrators were detained at Pier 57, a site opponents likened to a "Guantanamo on the Hudson." Additionally, the Parks Department refused permits for an anti-war march and rally planned for Central Park’s Great Lawn, citing concerns about potential damage to the recently restored lawn and inadequate police capacity. Critics contended that these actions infringed upon First Amendment rights.

Several organizations, including the National Council of Arab Americans and the ANSWER Coalition, filed lawsuits alleging that the permit denials were politically motivated. Court evidence showed Bloomberg was kept regularly informed about permit statuses and received direct updates from Parks Commissioner Adrian Benepe, suggesting mayoral involvement in these decisions.

9/11 first responders

On August 14, 2006, Governor George Pataki enacted legislation that increased death benefits for rescue personnel—such as firefighters and police officers—who subsequently died due to illnesses linked to their work at the World Trade Center site. Bloomberg opposed this bill, citing an anticipated annual cost increase between $5 million and $10 million as a financial strain on the city’s budget. Disputes also arose between the city and living first responders regarding health care cost coverage. On October 17, 2006, federal judge Alvin K. Hellerstein rejected New York City’s request to dismiss lawsuits demanding such health-related payments.

Bloomberg was also criticized for limiting attendance of many emergency personnel at the tenth anniversary ceremony commemorating 9/11 and excluding clergy members from participating, which sparked backlash from various groups nationwide.

Remarks on the Iraq war

In 2004, during a press conference held in lower Manhattan alongside First Lady Laura Bush, Bloomberg endorsed her viewpoint on Iraq by stating, "Don't forget that the war started not very many blocks from here."

By March 2007, Bloomberg expressed strong opposition to Congressional proposals mandating a timetable for troop withdrawals. He maintained that imposing deadlines would compromise military effectiveness and was detrimental both to national interests and military operations, stressing that such directives should not dictate how wars are conducted or strategized.