Washington - Former Alaska Gov. Sarah Palin predicted that Tuesday's midterm elections would bring a "political earthquake" to the country and reiterated her willingness to make the personal sacrifices necessary to run for president in 2012.

Speaking on "Fox News Sunday," the 2008 Republican vice presidential nominee said the message from voters this year would serve as an indictment of the current administration.

"They're going to say: 'You blew it, President Obama. We gave you the two years to fulfill your promise of making sure that our economy starts roaring back to life again.' And instead I believe things are getting worse," Palin said.

The election results also will deliver a stinging rebuke to the Republican establishment from the "Tea Party" movement, she said.

"Those within the establishment who have kind of perpetuated the problem by going along just to get along, including some who've been wishy-washy on the Obama-Pelosi-Reid agenda - the message sent to them is 'No more,"' Palin said.

But while acknowledging she was enjoying private life, the former governor hastened to clarify that she would be happy to step back into electoral politics.

"You know, the country is worth it, though, to make those sacrifices, when we talk about making money today, having a lot of fun today, having all this freedom," she said. "If the country needed me - and I'm not saying that the country does and that the country would ever necessarily want to choose me over anyone else - but I would be willing to make the sacrifices if need be for America."

Obama appeared at his final rally of the midterm season on Sunday, telling an audience in Cleveland that Republicans appeared boastful about their chances on Tuesday.

"I guess they're feeling cocky, maybe," Obama told a crowd of 8,000 at Cleveland State University in his 12th trip to Ohio as president.

Obama, joined by Vice President Joe Biden, spoke in a campus basketball arena that was a little more than half full, a fairly sparse crowd compared to the turnout at other campaign stops. Republicans mocked Sunday's crowd size, saying it showed voters in the perennial swing state of Ohio don't support Obama's agenda.

Obama criticized partisan comments by two legislative Republican leaders, Rep. John Boehner of Ohio and Sen. Mitch McConnell of Kentucky.

"The Republican leader of the House says, 'This is not a time for compromise.' That's a quote," Obama said. "The Republican leader of the Senate says his main goal for the next two years, his top priority, is to win the next election and to beat me."

"Think about this. His top priority is to win the next election."

The appearance ended a campaign blitz in which Obama addressed 250,000 people across the country. The White House believes that the president's appearances helped narrow a large "enthusiasm gap" between Republican and Democratic voters. But experts continue to predict widespread Republican victories on Tuesday, bringing a likely change in control of the House as well as GOP gains in the Senate.

Staff writer Peter Nicholas in Cleveland contributed to this report.