The 2006 United States Senate election in New York was held on November 7, 2006. Incumbent Democratic U.S. Senator Hillary Clinton won re-election to a second term in office, by a more than two-to-one margin. Clinton was challenged by Republican John Spencer, the former mayor of Yonkers. Longtime political activist Howie Hawkins of the Green Party also ran a third-party campaign.

The election was not close, with Clinton winning 58 of New York's 62 counties. Clinton had a surprisingly strong performance in upstate New York, which was considered to be a tossup. Clinton's large margins in both upstate New York and in New York City helped propel her to a landslide victory over Spencer. Clinton was sworn in for what would be her last term in the senate serving from January 3, 2007 to January 21, 2009 when she assumed the office of United States Secretary of State in the Obama administration.This election would be Clinton’s last successful campaign.

2006 United States Senate election in New York

Democratic nomination

Candidates

Hillary Clinton, incumbent Senator

Jonathan B. Tasini, journalist and anti-war activist

Withdrew

Mark Greenstein, businessman

Campaign

Hillary Clinton announced in November 2004 that she would seek a second term in the Senate, and began fundraising and campaigning. Clinton faced opposition for the Democratic party nomination from the anti-war base of her own party, that had become increasingly frustrated with her support for the Iraq War.

2006 United States Senate election in New York

On October 12, 2005 New Paltz firefighter and activist Steven Greenfield, a former Green Party leader, announced he would run as a Democrat. On December 6, 2005, labor advocate Jonathan Tasini announced that he would run as well, running as an antiwar candidate, calling for immediate withdrawal of troops from Iraq, universal health care, expansion in Medicare benefits, the creation of Universal Voluntary Accounts for pensions, and what he termed "New Rules For the Economy", a more labor-centric as opposed to the corporate-centric approach to economic matters espoused by Clinton. Tasini was president of Economic Future Group and former president of the National Writers Union. Tasini was supported by anti-war activist Cindy Sheehan, who had in October said of Clinton, "I will resist her candidacy with every bit of my power and strength...I will not make the mistake of supporting another pro-war Democrat for president again."

2006 United States Senate election in New York

On March 31, 2006, businessman Mark Greenstein announced his run for the seat. Greenstein, endorsed by the New Democrats, presented himself as a non-liberal Democrat who was campaigning to "bring the far left back to reality that Big Government is the source of most ongoing problems Democrat constituents face." He contended that Clinton was "too liberal" in her support for regulations, "too wishy-washy" on the Iraq war and on gay rights, and had lost integrity by using the Dubai Ports issue for political purposes. Greenstein challenged Clinton to sign a pledge that she would serve out her full 6 year Senate term if re-elected. However, in May 2006, Greenstein endorsed Tasini and essentially dropped out of the race.

On June 1, 2006, Clinton accepted the unanimous endorsement of the New York State Democratic Party's convention in Buffalo. Eight days later, Greenstein dropped out of the race. Tasini pressed on, submitting 40,000 signatures to the State Election Commission on July 14, far more than the 15,000 needed to force a primary. Clinton's campaign said that she would not challenge the signatures.

Results

Republican nomination

Candidates

K. T. McFarland, former Deputy Assistant United States Secretary of Defense

John Spencer, former mayor of Yonkers

Withdrew

Edward F. Cox, attorney and son-in-law of Richard Nixon

Jeanine Pirro, Westchester County District Attorney (December 21, 2005) (ran for Attorney General)

Campaign

New York Republicans originally had high hopes of mounting a serious challenge to Clinton, and derailing her expected future presidential bid. However, Clinton was politically strong in the state and no major Republican entered the race, with Governor George Pataki and early 2000 senate opponent Rudy Giuliani both declining to run. The two most prominent Republicans contemplating a challenge to Clinton were lawyer Ed Cox (the son-in-law of former President Richard M. Nixon) and Westchester County District Attorney Jeanine Pirro.