The 2008 United States Senate elections were held November 4, 2008, with 35 of the 100 seats in the Senate being contested. Thirty-three seats were up for regular elections; the winners were eligible to serve six-year terms from January 3, 2009 to January 3, 2015, as members of Class 2.There were also two special elections, the winners of those seats would finish the terms that ended January 3 …

https://en.wikipedia.org/wiki/United_States_Senate_elections,_2008