Rep. Andre Carson (D-IN) was the first to cast his lot with Obama, edging him even closer to the Holy Grail of the Democratic nomination.

"I am proud to support Barack Obama for President because he represents the kind of bold leadership and change that our country desperately needs," said Carson.

Later in the day, Obama won the backing of two Democrats from North Carolina, which votes on May 6 along with Indiana, as Rep. David Price and Rep. Mel Watt joined the Obama Bandwagon.

Last week it was Clinton who won three superdelegates in a day; this time Obama got the hat trick. 

Obama also emailed out a statement from "The Boss" himself, as Bruce Springsteen used his own web site to weigh in on the 2008 Democratic race.

"Dear Friends and Fans," the. Springsteen note begins, "Like most of you, I've been following the campaign and I have now seen and heard enough to know where I stand. Senator Obama, in my view, is head and shoulders above the rest."

Obama also put up a new ad in the Keystone State, going after Clinton, painting her as part of the "politics as usual" problem.

"Across Pennsylvania families are struggling," the ad begins.

"What's Hillary Clinton's answer? The same old politics. Misleading negative ads."

Clinton unveiled a new ad as well in Indiana, which votes on May 6.

"As your president, I will fight to keep good jobs here, and to turn this economy around," Clinton says in the ad.

As for Hillary, she spent the morning before the debate in DC, getting the endorsement of the Operative Plasterers' and Cement Masons' International Association.

"We need a leader with Hillary Clinton's ability to turn around the economy and rebuild the middle class," said OPCMIA President Pat Finley, in a statement issued by the Clinton campaign.

Springsteen versus the Working Man.   It's almost a metaphor for the way this campaign has developed.