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.
Corey Stapleton
In early 2013, he decided to run for the U.S. Senate and challenge longtime Democratic incumbent Max Baucus. Stapleton criticized Baucus's record and started a petition to repeal Obamacare. In April 2013, Baucus decided to retire.