According to Gallup, there was a 9-point increase in support for same-sex marriage in its polling since last year. It adds, though, that the issue remains "highly divisive":
"While big majorities of Democrats and young people support the idea of legalizing same-sex marriage, fewer than 4 in 10 Republicans and older Americans agree. Republicans in particular seem fixed in their opinions; there was no change at all in their support level this year, while independents' and Democrats' support jumped by double-digit margins."
Gallup's nationwide telephone survey was done from May 5-8. The firm surveyed 1,018 adults, with about 400 of them contacted on cellphones and the rest on landlines. The margin of error: +/- 4 percentage points.