The proposed primaru re-vote legislation in Michigan prevents those who've voted in the Republican primary from voting in the re-vote.

Fair enough, right?

But about 32% of the those who vote in the GOP primary, according to the exit polls, were Democrats or independents.

It's a fair bet that many of them were Obama supporters, as he was not on the original Michigan ballot.

This could be a dealbreaker for the Obama campaign in Michigan.

Michigan Democrats have said that they won't move the bill the forward unless the Obama campaign gives its assent.

I'm told the Obama campaign is reviewing this part of the legislation....