Nate Silver considers the evidence:
I think it is somewhat unlikely that gay marriage has in fact achieved plurality support, although I suspect it has come fairly close, and momentum clearly seems to be on its side.
My take here.
This article available online at:
http://www.theatlantic.com/daily-dish/archive/2009/05/is-that-a-sea-change-i-hear-ctd/202440/
