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 tends 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. Democratic nomination 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. 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." 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