You are always a Catholic because that mark of Baptism is always on your soul —— forever.
You can come back at any time — just sit down with a priest and get your questions answered.
If no one can escape being a Catholic once they are baptized as infants, then full fledged, adult Catholics walking out of the voting booth, and who are actual Catholics in fact and in self description of faith, are really and truly Catholics, even though most of them vote for pro-abortion, pro-gay, pro-immigration democrats.
In Catholic teaching. I was baptized as an adult... willfully... into a relationship with Christ.