[Constitutionalist Conservative]

He did refuse to vote for a marriage amendment to the U.S. Constitution on federalist grounds, but he showed off those Matlock-like lawyerly wiles this week with an alternative proposal that is even scarier because it’s more likely to be adopted. Thompson has proposed an alternative amendment, constitutionalizing the part of the Defense of Marriage Act that allows one state to refuse legal recognition of marriage licenses issued by another state to same-sex couples.

Thompson's alternative is quite consistent with federalism. Dunno why that makes him duplicitous in the columnist's eyes.

[Steve_Seattle]

"Thompson's alternative is quite consistent with federalism."

I disagree. To allow states to not recognize marriages performed in other states is contrary to the "full faith and credit" clause, by which states must recognize the legitimate legislative rulings of other states.