Christie: Romney Will Shine In Upcoming Debate [VIDEO]

New Jersey Gov. Chris Christie says it's been a "tough couple of weeks" for Mitt Romney in his presidential
campaign and there's no way to "sugarcoat" that.

But Christie says there's good news on the horizon for fellow Republicans. He says Romney is going to do "extraordinarily well" in the first debate with President Barack Obama on Wednesday night,

After that face-to-face meeting, Christie says "this whole race is going to be turned upside down."

FULL COVERAGE: 2012 Presidential Campaign
FULL COVERAGE: Christie's Sunday TV Appearances

Christie tells CBS' "Face the Nation" that every time Romney was backed into a corner during the GOP nomination fight, he "came out with a great debate performance because that's where he shines."

Host Bob Schieffer brought up Romney's comments about 47% of Americans not paying federal income taxes which Christie was not concerned about. "They know political candidates ... are going to say things inartfully."

Christie also said seniors should not worry about changes to Medicare under the Obama health care plan. "They're going to change Medicare for folks like me, who just turned 50, and younger," Christie said.

The Associated Press contributed to this report.