It does seem increasingly feasible — Sen. Rob Portman recently came out in support of gay marriage earlier this month, which might pave the way for some more Republican politicians to follow suit — although I think at this point it’s more likely we’re looking at a hard-fought battle between the true-north social conservative approach and the federalism tack, with Rand Paul’s hands-off strategy thrown in the mix, too.

The front-lines of the gay marriage debate move this week to the Supreme Court, as it considers two cases which have the potential to redefine marriage on a national level.

The arguments come at a time of changing views, with support for gay marriage becoming a mainstream Democratic position and the issue causing a sharp divide among Republicans.

The first case the court will take up, on Tuesday, is California’s Proposition 8 ban on same-sex marriage. The court on Wednesday weighs the Defense of Marriage Act, considering a provision that defines marriage as between a man and a woman for the purpose of deciding who can receive a range of federal benefits.

Update: I changed my headline from the GOP nominee to a GOP candidate — more concise!