Wyden-Bennett never made it very far, and its only real effect was that it dropped like safe on the head of one of its authors, Robert Bennett.
But at least two other Republicans in states whose attorneys general say that an individual mandate is unconstitutional went on the record as supporting the Wyden-Bennett version. They are therefore by the transitive property not supporters of the constitutional case, unless they've changed their minds.
They are Sen. Lindsey Graham of South Carolina and Sen. Mike Crapo of Idaho. Other Republican cosponsors included Sen. Judd Gregg of New Hampshire and Sen. Lamar Alexander of Tennessee.
Incidentally, Mitt Romney was a fan of the Wyden-Bennett approach, speaking of it favorably and noting in June of 2009 that many Republicans liked what they saw in it.
To paraphrase: politics is like fashion. One day you're in, and the next day, you're out.
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