I think it's fairly safe to call the race right now. Barring a Muskie/Hart moment, John Kerry wins the nomination.
John Edwards's best shot was to perpetuate the Kerry Can't Win In The South line. Instead, Kerry takes Tennessee by over 40% and Virginia by over
50%. Sweet Jebus. Edwards's Plan B at this point would be to get Kerry or Dean to back out and give him an endorsement, and even then I doubt he'd have the push to pass Kerry.
Howard Dean should've stuck with Plan B instead of going to the Final Battlefield Wisconsin Plan C. A win in Washington would've created it's own momentum going forward, especially given the energy Dean was getting from the WA Deaniacs. Then again, he's starting to physically look like death warmed over, so I have to wonder if he's still gunning for the lead or just to take Kerry down like Gep took out the Dean Machine in Iowa.
Wesley Clark? Third in Tennessee and that was his target state for the week. Oklahoma gave his campaign a spark, and TN quickly doused it. I'm not sure where his Plan B is outside of playing the spoiler or endorsing one of the other three.
Wisconsin, barring any surprises, should be the end of the beginning. Edwards spent his best shot. Clark is on life support. Dean is betting on the Deaniac's Last Stand. And nobody appears to be teaming up before Wisconsin. Save a Kerry finish worse than second, I'm not sure there'd be enough momentum and funds out of WI to carry on through Super Tuesday. John Kerry has exceeded all expectations so far, I just don't see how he'd fall barring something extraordinary.
(NOTE: As dKos has apparently turned into a Kerry-ABK warzone, I'll put this disclaimer as to my own preferences. I'm an Ohioan who is still planning on voting for Dean or whomever he endorses come March 2nd. I like Dean's energy and his platform, I just wish he had a better campaign.)