Crowds gather to see Clinton in Ind.

HAMMOND, Ind. Clinton categorically and emphatically rejected that suggestion that she drop out of the race now and endorse Barack Obama because she can't possibly win the delegate battle.

Clinton is telling Hoosiers in six cities over two days, including Hammond Friday afternoon, that she knows what it's like to be down and out, but she plans to keep on fighting and with the help of super delegates and the people in Indiana, to win the Democratic nomination.

Clinton is spending two full days in Indiana on what she is calling a Hoosiers economic tour, talking about jobs, health care and fair trade Friday morning in Mishawaka and later in Hammond.

"I really like the sound of Hillary, Hammond and history," she told the crowd.

Clinton is also categorically rejecting a call to get out of the race from Vermont Senator Pat Leahy.

"There is no way that Senator Clinton is going to win enough delegates to get the nomination. She ought to withdraw. She ought to be backing Senator Obama," said Leahy.

"There are some people who want to stop this election. And i got to tell you I think it's pretty exciting that Indiana is going to get to pick the next president of the United States," Clinton told the crowd.

>> President Clinton is her husband, and they were good times. I remember that very much," said Nicole Morton, Indiana voter.

"You would like a return to that even if we switch roles?" Morton was asked.

"I think we all would. I can't imagine somebody disagreeing with that," she responded.

Earlier Friday in Pittsburgh, Obama launched a six-day bus tour of his own across blue-collar Pennsylvania, sporting a major endorsement from fellow Senator Bob Casey who was very popular among the working class Catholic voters that Obama has had a hard time attracting so far.

"I believe in my heart that there is one person who is uniquely qualified to lead us in that new direction, and that is Barack Obama," Casey said.

"So when he called me and said, 'I just think this is the right thing to do,' that meant more to me, it meant as much to me as any endorsement that I have received on this campaign trail because I knew it was coming from the heart," said Obama.

Pennsylvania is an uphill state for Obama, a lot like Ohio, working class voters who favored Clinton in previous primaries of late. She is also a slight favorite in Indiana at this point because she has the support of the popular senator here, Evan Bayh. That is one of the reasons she wants this thing to keep going. She says there are 10 states between now and June 3.

The chairman of the Democratic Party, Howard Dean, said Friday that it makes sense to have all the primaries and then the super delegates should make a decision quickly so there is a united party by the time Democrats go to their convention at the end of August.

A Gallup poll out Friday showed Obama with an eight-point lead over Clinton nationally. That's his biggest lead in some time. It's a momentum sign. But she is, of course, a fighter like her husband and is not going to give up. She is on to Fort Wayne Friday night and three other cities in Indiana Saturday.

\Obama will be crossing the state of Pennsylvania between now and next Wednesday.