Obama finally admits to supporting gay <strike>rights</strike> marriage.

It's an issue that breaks along demographic and geographic lines a lot more cleanly than most. There has basically been a cultural tipping point in urban liberal areas that essentially have it that you aren't allowed to be against gay marriage, thinking on the issue that differs from the norm is socially unacceptable. So "support" is disproportionately pronounced. This effect concentrates support in certain areas, and leaves a solid majority of states with majority opposition to gay marriage.

States elect presidents.