It has been apparent since Gephardt stepped down as RAT leader in the House that he would throw his hat in...and the indications from the rumor mill here in SD are that Daschle very well may too.
The Dems remember a hard lesson from '92. The conventional 'wisdom' circulating then was that GHWB was unbeatable after the Gulf War went so well...so several of their big guns begged off...opening the door for Bubba. So very few are thinking along those lines now...they think the RAT nomination is worth something.