If treason means “giving aid and comfort to the enemy” in hopes of overthrowing a duly elected government, then I would think a military tribunal would be exactly where they should all be tried. Helping our enemies to be successful at enslaving us should be declared an act of war. These traitors are actively trying to destroy our country, just as much as if they had car bombs or tanks. They are giving our enemies the means to destroy us. They should definitely get military justice.
I too think it would be a great solution.
Hat tip to MNDude above for the CNN link he found for me.