Denny Rehberg served as the U.S. Representative for Montana's at-large congressional district from 2001 to 2013. During his time in the House, he was a member of the Appropriations Committee. Specifically, he served on the Subcommittee on Labor, Health and Human Service, and Education, where he was Chairman, as well as the Subcommittees on Energy and Water and the Legislative Branch. As a representative, Rehberg co-sponsored bills such as the National Security and Federal Lands Protection Act.