"He's been very attentive, and anything I've asked for, he's gotten to me," Christie said. "So I thank the president publicly for that."
Aides to both candidates were still waiting to see the storm's impact on the campaign.
"I don't have a clue what this will do," said Charlie Black, a Romney adviser. "Neither does anyone else."
While some campaign surrogates, such as former President Bill Clinton, continue to stump for the president, Obama won't be making a personal appeal for votes.
"This is the challenge of being the president and a candidate," said David Axelrod, the campaign's chief political strategist. "Being the president comes first. We as a campaign will make the adjustments as necessary and he'll do what he needs to do as president."
"Far too much credit" is placed on the impact of candidate rallies in the closing days of a campaign, Lichtman said. More important, he said, will be the storm's effect on early balloting and turnout on Election Day.
While researchers have looked at the impact of rain on the 2000 Election Day in Florida - the state that determined that year's winner - there has been nothing on the national scale of Sandy so close to an election, Lichtman said.
Bad weather tends to reduce turnout and historically that has helped Republicans, Lichtman said. With Democrats running ahead in early voting in many states, though, the storm and its aftermath "might affect the ability of Republicans to catch up," he said. "You may have very strange effects going on here. It's fascinating."