John Barrasso (born July 21, 1952) is an American politician and physician serving as the senior United States senator from Wyoming since 2007. A member of the Republican Party, he is the chairman of the Senate Republican Conference. Before entering politics, Barrasso practiced as an orthopedic surgeon. He is known for his conservative views, focusing on energy independence, fiscal responsibility, and healthcare reform. He has been a strong advocate for Wyoming's coal and oil industries.