Well, not really. It's been trotted out by the homophobes several times.
In her case, it's especially amusing.

I guess her husband Marcus the Mo got the idea
her!JANE SCHMIDT: Then, why can’t same-sex couples get married?
BACHMANN: They can get married, but they abide by the same law as everyone else. They can marry a man if they’re a woman. Or they can marry a woman if they’re a man.
Here's the entire conversation, just to show how crazy she is...
http://www.youtube.com/watch?v=RenwNhL1Te0&feature=player_embedded