"Feelings about gay marriage correlate to various religious traditions and levels of religiosity, with those nonaffiliated with any religion most supportive of gay marriage. It’s worth noting the dramatic recent shifts on the issue among Roman Catholics, whose ranks include Biden. Despite the Roman Catholic Church’s rigorous opposition to gays getting the right to marry, Pew found that Catholics support gay marriage by a margin of 52% to 37%. That’s a shift from 2010, when just 46% of Catholics favored gay marriage."