Sedition, at a minimum. Treason, if there’s any justice, despite is rare usage in recent history.
If these charges are put on the table, the rats will start squealing on each other, stet. Heck, they’ll probably go on tee vee and confess.
What do you think should happen to people that attempt to hand a country over to its enemies from the inside? What should happen to traitors that seek to engineer a situation that results in the deaths of countless millions of their fellow countrymen, while lining their own pockets and setting themselves up to slip into the night?
Wars have been started for far, far less. Heads have been chopped for a fraction of this intent.