A member of the Democratic Party, Leahy served as the President pro tempore of the United States Senate from December 17,2012 to January 6,2015; as President pro tempore, he was third in the presidential line of succession.
A member of the Democratic Party served as the President pro tempore of the United States Senate from December 17,2012 to January 6,2015. The Democratic Party was Leahy. He was third in the presidential line of succession. This was as President pro tempore.