Max Baucus
Max Sieben Baucus (né Enke; born December 11, 1941) is a retired American politician and diplomat who served as a United States Senator from Montana from 1978 to 2014. A member of the Democratic Party, he was a U.S. Senator for nearly 36 years, making him the longest-serving Senator in Montana history. President Barack Obama appointed Baucus to replace Gary Locke as the 11th United States Ambassador to China, a position that he held from 2014 until 2017.
Paul G. Hatfield
On January 22, 1978, Montana Governor Thomas Lee Judge appointed Hatfield to the United States Senate to fill the vacancy caused by the death of Lee Metcalf for the term ending January 3, 1979. He served from January 22, 1978, until his resignation December 14, 1978. He was defeated for renomination in the Democratic primary in June 1978 by Congressman Max Baucus with Baucus getting 87,085 votes (65.3%) to Hatfield's 25,789 (19.3%). There were two other minor candidates in the race. After that nominating defeat, Hatfield remained in the Senate until his own resignation when the election of his successor, Baucus, was officially certified after the general election in November 1978. Max Baucus praised his former primary opponent for being "one of the most decent and thoughtful people I've had the privilege of knowing."