Benjamin Franklin Wade

Benjamin Franklin "Bluff" Wade (October 27, 1800 – March 2, 1878) was an American lawyer and politician who served as a United States Senator for Ohio from 1851 to 1869. He is known for his leading role among the Radical Republicans including support for civil rights, women's suffrage, and trade unions. Had the 1868 impeachment of U.S. President Andrew Johnson led to a conviction in the Senate, as president pro tempore of the U.S. Senate, Wade would have become president for the remaining nine months of Johnson's term.
https://en.wikipedia.org/wiki/Benjamin_Wade