Pretty all Christian Churches are entitled to excommunicate the members whose stance is not in line with their teachings. I mean...the Pope is entitled to excommunicate Italian Nationalists.
He refused to meet the European Trump...because of his alleged racist policies.
Yes, the Pope can do it.
I was talking about ethics, not legal limits.
IMO, it's unethical for a church to try to influence secular law, even if it's through internal discipline against members who happen to be lawmakers.
There's no legal punishment for churches who behave unethically, but this issue is one that - for me as a secularist - helps to categorize churches.
If a church actively tries to undermine secular government by trying to impose their religious ideology through secular law, I would say that the church not only invites outside interference, but anyone who cares about liberty and democracy
ought to step in urgently and interfere with that church until they're no longer a threat to our basic institutions.