In states that ban same-sex marriage, opinions tilt narrowly in support, 50 percent to 44 percent opposed. Opinions in these states are even more closely divided on whether or not it is a constitutional right, with 45 percent saying it is protected and 48 percent saying it is not. That includes the handful of states where federal court decisions against gay marriage bans are pending appeal. In states where gay marriage is allowed, 64 percent support it and 56 percent see it as a right.

Most demographic and political groups support gay marriage. Republicans continue to oppose it, but the GOP (and independents who lean GOP) are fractured by age. Republicans under 50 lean in support while those 50 and over oppose it.