But they can keep the honor of calling themselves Catholic because merely supporting abortion by vote and voice isn't a sufficient reason to be excommunicated.
Canon 1398 is clear: "A person who actually procures an abortion incurs an automatic excommunication," the canon states. Abortion is intrinsically evil as an act, and the Catechism of the Catholic Church rightly teaches in paragraph 2271 that abortion "is gravely contrary to the moral law" and an "abominable crime."
With regard to those who perform, promote, fund, or are accessories to the practice of abortion, the second paragraph of Canon 1329 already provides for their automatic excommunication as accomplices who, "without their assistance, the crime would not have been committed ..."
It is clear to me that a man or woman who holds political power, who either legalizes of "enables" abortion, especially one who votes against restricting it, or votes in favor of funding it, qualifies as an accomplice and thus comes under canonical excommunication.
All that is needed, is that Catholics in large numbers start acting like Catholics. And that includes the bishops. And me. And, if you're a Catholic, you.