Dean may very well win, and you should support him as long as he's in the race.
But if Dean loses, you owe it to your country to take the fight to Bush, just as hard as if your guy Dean won.
In my first campaign, I was for Bob Kerry against Clinton in the primaries. Kerry got killed, and I was bitter for a week or two. But then I got back on my feet, and got behind Clinton 100%. It was the best decision I ever made.
Remember -- the most important thing is to get rid of Bush -- never forget that!!!