Have a loyalty program, round up all the commies wormed into the intel apparatus, give them a rapid fair trial, and shoot them at dawn.
Then hire only men dedicated to defending the country and ideologically committed to advancing US power in the world.
"But, but, all the lawyers would never go for it."
(Exasperated "do I have to think of everything look")
"You shoot them first..."
However what doesn’t exist is the political will to prosecute.