1978 United States Senate election in Montana
The 1978 United States Senate election in Montana took place on November 7, 1978. Following the death of United States Senator Lee Metcalf on January 12, 1978, Montana Supreme Court Chief Justice Paul G. Hatfield was appointed to serve for the remainder of Metcalf's term. Hatfield opted to run for re-election, but was overwhelmingly defeated in the Democratic primary by United States Congressman Max Baucus of the 1st congressional district. Baucus advanced to the general election, where he was opposed by Larry R. Williams, an author and the Republican nominee. Baucus ended up defeating Williams by a solid margin to win his first term in the Senate, and, following Hatfield's resignation on December 12, 1978, he began serving his first term in the Senate.
1984 United States Senate elections
Incumbent Max Baucus ran for re-election. He easily won renomination in the Democratic primary, and advanced to the general election, where he faced Chuck Cozzens, a former State Representative and the Republican nominee. Despite President Ronald Reagan's strong performance in the state that year, Baucus was able to easily win a second term over Cozzens.