Jefferson Davis was arrested at the end of the Civil War ostensibly to be charged and tried for Treason. Never happened and he was released. Why? Because legal scholars and others at the time could not show that secession was unconstitutional.
+1
Davis would have had to have been tried in the South. In Richmond (or maybe Montgomery). It could have been hard to find a fair jury or guarantee the trial court’s safety, so the government decided not to bother.
LOL! No. But they did show that rebellion was illegal.