Dennis Rehberg first ran for office in 1984 when he was elected to the state House. He was re-elected in 1986 and 1988.
He was chosen by Marc Racicot to be his running mate in the 1992 gubernatorial race. They won with 51.3 percent of the vote.
Rehberg chose to run for the U.S. Senate in 1996, rather than seek re-election with Racicot. He lost to Democratic incumbent Max Baucus, 49.5 percent to 44.7 percent in a four-way race.
Rehberg won his House seat in 2000 with 51.5 percent of the vote. In 2002, he was re-elected with 64 percent of the vote against a largely token Democratic challenger. In the 2004 election, he faces another relatively unknown opponent with no experience in a statewide race and little money.
He was campaign manager for Rep. Ron Marlenee, R-Mont., in 1986 and for Sen. Conrad Burns, R-Mont., in 1988.