The 2009 special election for the 20th congressional district of New York was held on March 31, 2009 to fill the vacancy created in January 2009 when the district's representative, Congresswoman Kirsten Gillibrand, was appointed US senator from New York, replacing Hillary Clinton, who had been appointed Secretary of State in the Obama administration. The two major-party candidates were Democrat Scott Murphy, a private businessman, and Republican Jim Tedisco, the minority leader of the New York State Assembly. A third-party candidate, Libertarian Eric Sundwall, was initially included in the race, but later removed from the ballot.
Major issues brought up during the campaign were the candidates' positions on President Obama's stimulus plan, which Tedisco did not take a stance on until late in the race. Murphy supported it while Tedisco eventually opposed it. Tedisco portrayed Murphy's support of the plan as a potential cause of the AIG bonus scandal. Tedisco's campaign also brought up Murphy's failure to pay taxes on a company he founded in the 1990s. A frequent Murphy talking point was that Tedisco's primary residence was not in the Congressional district.
The race was so close that one early vote count had the candidates tied at 77,225 votes each. Absentee ballots decided the election; ballots were accepted until April 13. While Tedisco had been ahead in early counts, by April 10 Murphy was leading, and by April 23 Murphy had a 401-vote advantage. Tedisco conceded the race the following day, and Murphy was sworn in on April 29. Democratic electoral successes in November 2008 and Murphy's clear support of the stimulus package were credited for his success.