>>2765403
I am 100% certain McCain was convicted in a military tribunal for treason and executed.
The oath that a military swear is for life. As a former military, McCain could therefor face trial in a military tribunal.
McCain had affairs with Saudi Arabia before it was cleared of corruption by crown prince Mohammad bin Salaman. Salaman is known to cooperate with the Trump administration. It is not unlikely that Saudi Arabia could deliver enough evidence of treason against McCain to convict him.
As for traitors that has not served in the forces; they have to wait until after 1/1 2019 when Trumps EO goes into effect.