Shifts on same-sex marriage come from surprising groups

It’s not just Democrats and liberals who are the reason for the shift on gay marriage.

Beneath the broad support from liberal-leaning demographic groups, is the fact that some of the biggest shifts in favor of gay marriage since 2004 have been from some more unlikely, conservative-leaning blocs — blue-collar workers, older voters, and Southerners, according to NBC News/Wall Street Journal polls over the last decade. [cont.]

Domenico Montanaro, NBC News

Recent polls: Marriage