ABC News’ Kate Snow and Eloise Harper report: As she makes her way across Ohio, Sen. Hillary Clinton, D-N.Y., is preaching optimism.
"I have seen in the last weeks, the resilience, and the grit and the determination of the people of Youngstown, and across Ohio, and we’re going to win!" she told voters in Youngstown, Sunday.
But privately, Clinton campaign advisors say their own internal polls show the race tightening in Ohio and remaining very close in Texas.
"We’re going to go full bore and see what happens," a senior advisor told ABC News, Sunday.
Sen. Barack Obama, D-Ill., is outspending Clinton on the airwaves by about two to one. And in some markets, Clinton aides say they believe he has spent closer to three times as much on advertising.
"I’ve never seen the likes of this," said the advisor.
In their best case scenario, Clinton aides hope she could win Ohio by 3 to 6 points and squeak out a victory in Texas. They would consider that a good night and reason to fight on to Pennsylvania, which holds its primary on April 22.
Other scenarios, they admit, are not so pretty.
"If she wins Texas and loses Ohio, it becomes a harder argument to make that she can win Pennsylvania," said the senior advisor.
And pressure among fellow Democrats is mounting.
On Sunday, New Mexico Governor Bill Richardson — who recently left the Democratic presidential race — said he thinks the nomination should be decided on Tuesday, no matter what.
"You know, the concern that I have is the bickering that took place between those two very fine senators is going on too long," Richardson said on the CBS program "Face the Nation."
"D-Day is Tuesday," he continued. "We have to have a positive campaign after Tuesday. Whoever has the most delegates after Tuesday, a clear lead, should be, in my judgment, the nominee."
The Clinton campaign is calling superdelegates who have already voiced support for Clinton (what they call "automatic" delegates) to try and convince them to stay with the senator, no matter what happens on Tuesday.
And they continue to try and persuade uncommitted superdelegates to join the Clinton ranks.
But increasingly, said the advisor, the first thing out of their mouths is, "We’re waiting to see what happens."