A CBS News poll out this morning finds most Americans think same-sex marriage should be legal. Among those surveyed, 53% give the green light to legal same-sex marriage, while 39% say it should not be legal.

That's a change from May of last year, when 51% counted themselves on the not legal side. Among those who think it should be legal, 33% say they once felt otherwise, with the leading reason for changing their minds being that they know someone gay or lesbian.