Should have added this final paragraph:

"This trend will continue. Nationally, a majority of people under age 30 support same-sex marriage. And this is not because of overwhelming majorities found in more liberal states that skew the national picture: our research shows that a majority of young people in almost every state support it. As new voters come of age, and as their older counterparts exit the voting pool, it's likely that support will increase, pushing more states over the halfway mark."