The Northeast is flooded with Cafeteria Catholics who go to Mass maybe twice year. They are left-wing voters and no amount preaching will make them change their mind. Catholics who regularly attend Mass vote for the most conservative candidate. In this respect Catholics are no different than any other denomination. In otherwords there is no such thing as the Catholic vote.
Except that there is, it has gone democrat in every presidential election in our history, with 5 exceptions, and will probably always go democrat in the future. That is a predictable 'Catholic vote'.