A new Pew poll shows that more people favor gay marriage than oppose it - 47% to 43%.
That would not persuade me in itself. But when you parse the data, majorities of women favor gay marriage, majorities of moderates favor gay marriage, and, most importantly, majorities of the two youngest generations favor gay marriage.
The tide has turned in favor of gay marriage. In a decade, it will not be an issue in most places in America.