Mitt Romney predicted Friday that he and his rivals for the Republican presidential nomination will ultimately close ranks to ensure that Barack Obama is turned out of the White House.

"We'll put our egos and bruised feelings aside and then come back and do what's the right thing for our nation," Romney, who leads the crowded field for his party's nod to take on Obama in November 6 elections, told supporters in New Hampshire.

"If I am not the nominee, I will be supporting our nominee, and working for him. I will work hard for our nominee," the former Massachusetts governor and millionaire venture capitalist said at a spaghetti dinner for 100 people.

Romney has been locked in an bitter battle for the nomination, but his vast campaign warchest and high-profile endorsements have fed his image as the candidate to beat.

"When it's all over, we ought to be able to hug and go to work to get one of us elected president of the United States," he said. "Because if there's a candidate who thinks this campaign is about them, they're wrong. This is a campaign about America."

Romney also warned his supporters not to be complacent in the face of his vast lead in the polls ahead of New Hampshire's first-in-the-nation nominating primary on January 10.

"We're in a real battle right now. I know some pollsters say I'm doing real well. Let me tell you those polls they can just disappear overnight," he said.