I think the "logic" runs something like this: Sanford supporters are hypocrites if they claim both that they support the institution of marriage and that they support a candidate who has shown such disrespect for that institution.
And I should mention the corollary: 2+2=Green.
Note to self: Never again force yourself to think like Meghan McCain.
If that’s what she means, then no one should vote for her dad either.