Michigan Democrats seem to be on the verge of a breakthrough, and Florida Democrats are stuck in the mud. Why the disparity?

Simple internal politics. Had Sen. Bill Nelson consulted more widely with House Democrats and Democratic activists in Florida, he might not have encountered the near fatal opposition to a mail-in primary that has set itself in his path today. Meanwhile, after an initial burst of publicity, Michigan Democrats pulled in all their powerful actors -- Gov. Granholm -- the Dingells, the UAW, the NEA, the state party, the Kilpatricks -- and worked their differences out behind the scenes.