Marc Ambinder has the story. It seems to me that there are some real consequences to this.
First, doesn’t an exciting win (say Mike Huckabee or Fred Thompson) or a blowout by Mitt Romney get buzz-killed by the probably-more-interesting Democratic race? Is one real day of news about the GOP race going to be enough?
Second, doesn’t the Dem caucus being on a Saturday fundamentally change who shows up? Doesn’t Barack Obama have a "turn out the kids" strategy on a Saturday afternoon that you just can’t do on a Tuesday night? And isn’t union turnout higher?