SUPERDELEGATES TO WEIGH IN?
But neither can win without help from superdelegates - nearly 800 party insiders and officials who are free to back any candidate. Tuesday's results undermined Clinton's argument that she has the best chance to beat McCain in November.
More than 250 superdelegates remain uncommitted. If the majority begin to move toward Obama they could quickly settle the race. Some Obama backers hoped the movement starts soon.
"It's now time for the superdelegates to begin bringing this process to a close," said Arizona Gov. Janet Napolitano, an Obama supporter.
Four superdelegates endorsed Obama on Wednesday, including George McGovern, the 1972 Democratic presidential nominee who switched his allegiance from Clinton to Obama.
"It's time for us to unite and get ready for the fall campaign," he told Reuters from his South Dakota home. He said he informed Clinton's husband, former President Bill Clinton.
"He just wanted me to know that he thinks that Hillary has made a great race and it's up to her to decide when she leaves. And I don't argue with that," McGovern said.
Another superdelegate, U.S. Rep. Heath Shuler of North Carolina, endorsed Clinton. She was scheduled to meet on Wednesday with other superdelegates on Capitol Hill before an evening fundraiser in Washington.
Obama, 46, took the day off at home in Chicago.
Sen. Claire McCaskill of Missouri, an Obama supporter, said Clinton should not be rushed out of the race.
"I think it would be inappropriate, awkward and wrong for any of us to tell Sen. Clinton when it is time for the race to be over," she said.
Clinton won Indiana by fewer than 23,000 votes out of more than 1.25 million cast, taking the state by 51 percent to 49 percent. She had hoped to win by a bigger margin.
At her victory rally on Tuesday in Indianapolis, the 60-year-old former first lady asked for campaign donations.
Clinton still hopes to find a way to seat delegates from Michigan and Florida, where she won contests in January that are not recognized by the national party because of a dispute over their timing.
