Elections for the United States Senate were held on November 4, 2008, with 35 of the 100 seats in the Senate being contested. Thirty-three seats were regular elections; the winners were eligible to serve six-year terms from January 3, 2009, to January 3, 2015, as members of Senate Class II. There were also two special elections: one in Mississippi and another in Wyoming; the winners serve the remainder of terms that expire on January 3, 2013, as members of Senate Class I.