In an appearance the same day in Iowa, Perry did not quite reciprocate the kindness, continuing to hammer Romney on immigration issues.

Like Perry, Romney continued to criticize the president's announcement of a troop withdrawal from Iraq by year's end. Noting that negotiations had been underway to keep a cadre of U.S. forces in Iraq, Romney said that Obama "failed to deliver" a deal to do so. "Why did it fall apart?" he asked, suggesting that Obama was either "out-negotiated" or made a "political recalculation."

Romney also offered a warm defense of Sen. Marco Rubio, a Florida Republican who is widely regarded as a potential vice presidential candidate, but whose story of his family's flight from Cuban dictator Fidel Castro came under question this week. The Washington Post reported that Rubio's parents arrived in Florida before Castro's rise to power.

"I have the highest respect for Marco Rubio. I think his family's history of having come to this country speaks for itself," said Romney, adding: "I think the world of Marco Rubio, support him entirely and think that the effort to try to smear him was unfortunate and bogus."

Romney's appearance here came just before Nevada Republican leaders voted to hold their presidential caucuses Feb. 4, ending a scheduling squabble with Republican officials in this state and a political dilemma for Romney, who had been under pressure to join a boycott of Nevada, a state whose caucuses he easily won in 2008, out of solidarity with New Hampshire.

Nevada Republicans' original proposal to hold their caucuses Jan. 14 infuriated Granite State politicos, who thought it would dim the luster of their historic first-in-the-nation primary, likely to be held Jan. 10. Romney, who served as governor of neighboring Massachusetts and owns a vacation home here, needs a strong showing in New Hampshire. "I sure hope this gets resolved," he said here, shortly before the intra-party fight was.

At his campaign headquarters here, Romney provided pizza for volunteers and made a few phone calls to voters himself and proved a game improviser when he had to go off script.

"Hi! Oh, this is the wrong number?" he could be overheard on one call. "Well, do you know who Mitt Romney is? It's me! I'm on the phone!"

Image credit: Brian Snyder/Reuters