Denny Rehberg, Montana's current at-large Congressman, ran for re-election.
[1] He defeated Libertarian Mike Fellows and Democrat Dennis McDonald.
[2] Many state offices in Montana, including Governor, Lieutenant Governor, Secretary of State, Attorney General, Auditor, and Superintendent of Public Instruction, were not up for re-election in 2010.
[3] Twenty-five seats in the Montana Senate were up for election in 2010.
All one hundred seats of the Montana House of Representatives were up for election in 2010.