Historical Highlights
President Pro Tempore John Ingalls Feb 26, 1887
Senate Deadlocked May 11, 1911
Presidential Succession Act Jul 18, 1947
Other Resources
Pro Tem: Presidents Pro Tempore of the United States Senate Since 1789
The President Pro Tempore of the Senate: History and Authority of the Office (CRS) (PDF)
Return to About the President Pro Tempore
