The United States Senate expels Missouri Senators Waldo Johnson and Trusten Polk for treason
Calls for the immediate expulsion of the two Missouri senators had been made in December 1861 but the Senate insisted on proper procedure. The Judiciary Committee took up the case and found that both had crossed into Confederate territory, had sworn oaths of allegiance there, and were therefore guilty of treason. The Committee recommended expulsion the day before and the full Senate ended the tenure of Waldo Porter Johnson and Trusten Polk on votes of 35-0 and 36-0, respectively. (By John Osborne)
Robert C. Byrd, Mary S. Hall, The Senate, 1789-1989: Addresses on the History of the United States Senate (Washington, DC: U.S. Government Printing Office, 1988), 236.