There was an exodus of Southern Senators from Washington when the Confederacy was forming. Senators from seceded states like Davis, Clay, Chestnut, etc. One we rarely hear about is Senator David Levy Yulee of Florida.I don't know much about him but he was Jewish and really named Levy instead of Yulee. In fact the first person of Jewish descent elected to the U.S. Senate and his father and the father of Judah Benjamin were supposedly first cousins. Wikipedia names him as C.S. Secretary of the Navy. I'm sure Stephen Mallory would be surprised.