Clinton Calls for Supporters to 'Max Out' Their Donations

Sixty-eight percent of voters said they thought Clinton attacked Obama unfairly, according to ABC News' exit polls. Fifty percent thought the Illinois senator had been too harsh on Clinton, according to the same poll.

Obama's Morning After

Already in Indiana in anticipation of the May 6 Democratic primary, Obama remained upbeat Tuesday night as he delivered a speech to supporters.

"You can decide whether we're going to travel the same worn path or whether we chart a new course that offers real hope for the future," said Obama, who had the company of singer John Mellencamp.

Indiana and North Carolina combined have more delegates than Pennsylvania. The senator is hoping that those next contests will help him close the deal and erode any gains made by Clinton this week.

And while Clinton's win in Pennsylvania may have momentarily slowed the Obama campaign, a senior staffer remained optimistic.

"If you don't think we've done well enough, ask the Clinton folks if they'd like to trade places with us," said Obama senior campaign strategist David Axelrod.

In exit polls, 55 percent said they still expected Obama, not Clinton, to be the Democratic party's eventual nominee.

"We will keep this country's promise alive," said Obama Tuesday night. "That's our path, that's our job.

"Let's get to work," he said.

ABC News' George Stephanopoulos noted this morning that with voters who made up their mind in the past three days, Clinton "trounced" Obama, 58 to 42 percent.

There is also some indication that race might be playing a factor in the campaign; one in six white voters said that race was a factor and only half of them said they would vote for Obama against Republican presidential nominee John McCain.

"Something is holding them back," said Stephanopoulos. "It could be race."

As the race for the Democratic nomination moves forward in the coming weeks, Stephanopoulos said it will take a surprising win to end the heated race.

"The only thing that changes this race right now is if one wins a state where the other is favored," he said. "That means if Obama wins in Indiana on May 6, this race is over."

"If Senator Clinton can somehow win not only in Indiana where she has a lead right now, but can get some sort of upset or come close in North Carolina, that may be the kind of win that can change the minds of these superdelegates," said Stephanopoulos.