Massachusetts Senator George Boutwell, one of the founders of the Republican Party

Missouri Senator Benjamin Gratz Brown

Senator Orville Hickman Browning

General Don Carlos Buell

General Ambrose E. Burnside

General Benjamin F. Butler

General Daniel Butterfield

Secretary of War Simon Cameron

General Samuel Sprigg Carroll

General Silas Casey

Michigan Senator Zachariah Chandler

Secretary of the Treasury Salmon P. Chase

New Hampshire Senator Daniel Clark

General John Cochrane

Speaker of the House of Representatives Schuyler Colfax

Senator Jacob Collamer

New York Representative and Senator Roscoe Conkling

General Darius N. Couch