2012 United States Senate election in Wisconsin

The 2012 United States Senate election in Wisconsin took place on November 6, 2012, alongside a U.S. presidential election as well as other elections to the United States Senate and House of Representatives and various state and local elections. Incumbent Democratic Senator Herb Kohl retired instead of running for re-election to a fifth term. This was the first open Senate seat in Wisconsin since 1988, when Kohl won his first term. Primary elections were held on August 14, 2012. Congresswoman Tammy Baldwin of Wisconsin's 2nd congressional district ran unopposed in the Democratic primary. The Republican nominee was former Wisconsin Governor and U.S. Secretary of Health and Human Services Tommy Thompson, who won with a plurality in a four-way primary race. In the general election, Baldwin defeated Thompson and won the open seat. She became the first woman elected to represent Wisconsin in the Senate and the first openly gay U.S. senator in history. This is also the first time Thompson lost a statewide race. Background Incumbent Democratic senator Herb Kohl was re-elected to a fourth term in 2006, beating Republican attorney Robert Lorge by 67% to 30%. Kohl's lack of fundraising suggested his potential retirement. There was speculation that Kohl might decide to retire to allow Russ Feingold, who lost his re-election bid in 2010, to run again, although Mike Tate, chairman of the Wisconsin Democratic Party, dismissed speculation about Kohl's potential retirement. Ultimately, Kohl announced in May 2011 that he would not run for re-election in 2012. Democratic primary Despite speculation that Kohl would retire to make way for his former Senate colleague Russ Feingold, who had been unseated in 2010, Feingold chose not to enter the race. Other potential candidates also declined to run, so Baldwin was unopposed in the Democratic primary.