Catholics are not allowed to vote pro-abortion are they?
Aren’t they disinvited from communion if they do?
That is my understanding and this has been reiterated by the Pope and several bishops recently. Unfortunately, there are some who ignore this. Abortion is a mortal sin, it is not justifiable under any circumstances -- despite what some would have us believe, there is no "grey area" here.
Arent they disinvited from communion if they do?
Theoretically, a Catholic can excommunicate themselves through certain actions, I'm not sure where this falls into that. A Catholic voting for a pro-abortion politician is somewhat different from a Catholic politician voting to support abortion.
I would love to see a priest publicly refuse to give Communion to someone like Biden and Pelosi. It would be a seemingly insignificant act, but it would open the eyes of millions of voters including many non-Catholics.