"Catholics No Longer Behave Self-Consciously as 'Catholics' on Hot-Button Issues"

"To a large extent, that shift has simply reflected the broader ideological polarization of the two parties, which demolished traditional ethnic loyalties. Moreover, the upward mobility and suburbanization of previously urban white Catholics communities has naturally made them more susceptible to Republican economic and cultural appeals, a trend that among Catholics as a whole has been partially offset by the influx of Democratic-leaning Hispanics."

Ed Kilgore in The New Republic argues that a Catholic voting bloc does not exist.