Fifty percent say the U.S. Constitution’s guarantee of equal protection gives gays the right to marry, while 41 percent say it does not.

Beyond the constitutional questions, a record-high 59 percent say they support same-sex marriage, while 34 percent are opposed, the widest margin tracked in Post-ABC polling…

In the 33 states that prohibit same-sex marriage, 53 percent of those polled support allowing it, while 40 percent oppose doing so.