Treason doesn't really cut it-- Trump ignoring Russia's bounties is revolting, but...
may not actually rise to treason.
Historically, treason meant to try to displace the King, or his Lords. The Confederacy could be argued to be treason, but even there it fall short since we don't have a King. I suppose it would work just saying overthrow the government without getting personal. But, even then they weren't overthrowing the government, just getting away from it. And they lost, so fuck 'em.
(Note that the Rosenbergs weren't tried for treason, just espionage. Tokyo Rose, Axis Sally, and Lord Haw Haw, were tried for treason, since they worked for the enemy during war time. Haw Haw was hanged by the Brits, but the American women who took up the other roles were given jail time.)
But, I digress. The crime that fascinates me is the old Admiralty offense of barratry. Nowadays it often means filing frivolous lawsuits (also a Trump habit) or ambulance chasing, but it also means the captain and/or crew attempting to steal the ship from the owners. This was once a bigger problem with crews taking over cargo ships and becoming pirates. That kinda sounds like what Trump & Crew is doing with the Republic.
Charge Trump with taking over the government from the people, its rightful owners, and taking off for a life of international piracy.
Sound right?