Their careers SHOULD be ended. If they are voting a certain way because their party told them to and the American public doesn't like their decisions then fuck them. They shouldn't receive "protection." The US government shouldn't be run like the mafia.
Nazis killed jews because the government told them to do that too...
Politicians need to stand by the actions they make and the way they vote and be held accountable. If your a democrat or a republican politician and don't like what the party is telling you to do, DON'T do it! Durka Durka