On CBS's "Early Show" this morning, DNC chairman Howard Dean said that superdelegates ought to decide which candidate to support by July 1.
"Well, I think the superdelegates have already been weighing in. I think that there's 800 of them and 450 of them have already said who they're for. I'd like the other 350 to say who they're at some point between now and the first of July so we don't have to take this into the convention.
“Well, I think the candidates have got to understand that they have an obligation to our country to unify. Somebody's going to lose this race with 49.8 percent of the vote. And that person has got to pull their supporters in behind the nominee. That's our obligation, because in the end this is not about Hillary Clinton and Barack Obama. It's about our country. We're not going to have four more years of George W. Bush, which is essentially what McCain is offering us. There's a really big difference between our candidates on these issues. And I don't believe for a moment that at the end of the day, the Democrats are going to vote for somebody who's going to put more right-wingers on the Supreme Court. But we do need to keep in mind that personal attacks now, often do have the seeds of demoralization later on. So I want to make sure this campaign stays on the high ground.”