So here is a worst case scenario for 2008:

Lets say there is a clear Democratic frontrunner, probably Hillary or Obama. By Feb 5th they have the votes locked up for the nomination and then they start campaigning.

Lets also say there isn’t a clean GOP frontrunner. No candidate has a lock on the nomination, and they are all campaigning to win the votes of delegates on the 3rd ballot.

The Dem candidate can go into full fundraising mode, he/she has the lock and that party can unite behind their candidate in Feburary.

The GOP won’t unite till September once the convention is over. There will surely be sore-loser supporters who won’t support the eventual nominee.

Furthermore, the nominee will have had to promise all sorts of things to GOP special interest groups. That will make him that much harder to sell to independents in the General election.

Of course, by the end of the year, there could be a clear GOP frontrunner and no Democratic frontrunner and this all works in our favor. And I still think a national primary day is the only thing that is going to get rid of the stupidity of Ag Subsidies, so it could be worth it in the long run.