Former Rep. Denny Rehberg told the Billings Gazette last week that he will not run for office again.

After six terms in the House, the Montana Republican lost his challenge to Democratic Sen. Jon Tester in November. It was Rehberg’s second Senate defeat, after challenging Democratic Sen. Max Baucus in 1996.

“I made the determination before [the 2012 race] that it would be up or out,” Rehberg said in an interview with the newspaper. “As it turned out, it was out.”

Baucus is up for re-election again this cycle and is definitely running. Tester survived by 4 points in the 2012 election, despite a 13-point victory in the state by GOP presidential nominee Mitt Romney.