2012 United States Senate elections
The 2012 United States Senate elections were held on November 6, 2012, with 33 of the 100 seats in the Senate being contested in regular elections whose winners would serve six-year terms beginning January 3, 2013, with the 113th Congress. Democrats had 21 seats up for election, plus 1 Independent and 1 Independent Democrat, while the Republicans had only 10 seats up for election. The Democrats gained Republican-held seats in Massachusetts and Indiana and one from an Independent Democrat in Connecticut, leaving them with a total of 53 seats. Additionally, they held open  seats in Hawaii, New Mexico, North Dakota, Virginia, and Wisconsin. The Republicans, despite losing two of their seats, picked up an open seat in Nebraska and retained open seats in Arizona and Texas, ending with a total of 45 seats. The Independents retained a seat in Vermont and gained an additional seat from the Republicans in Maine, bringing their total to two seats. Both Independents would caucus with the Democrats, forming a majority caucus with a combined total of 55 seats. , this was the last time the Democrats won an outright majority in the Senate; seats in Florida, Indiana, Missouri , and North Dakota; and at least one seat in a state that was lost by the Democratic candidate in the concurrent presidential election. It was also the last time the Republican Party won a seat in Nevada. The Democrats would not win control of the Senate again until 2020. The presidential election, elections to the House of Representatives, elections for governors in 14 states and territories, and many state and local elections were also held on the same day. Results summary. Shading indicates party with largest share of that line.