It looks like Rick Santorum won his argument about the conservative stool: CPAC, the American Conservative Union's annual conference, will no longer allow groups that support legal equality for gay Americans to participate their annual gathering, says group leader Al Cardenas:
“If you are a group, and this has got nothing to do with your orientation,” said Cardenas, “of straight couples, and you advocate gay marriage, that’s not within the scope of what we believe the three legs of the stool of the movement are.”
Or, put another way, CPAC doesn't care whether a group's membership is straight or not...the only thing that matters is that they be anti-gay.