The poll finds Obama receiving a boost from his handling of Hurricane Sandy, with 7 in 10 approving of his performance.
Romney leads Obama 51-46 in the poll, with independents breaking for him 49-43.
A new survey shows a dead heat in Ohio’s Senate race, with two days left before voters head to the polls.
Both candidates also split independent voters at 46 percent support each, in the latest ABC/Washington Post poll.
Obama's lead in the new Columbus Dispatch poll is within the 2.2 margin of error.
Forty-two percent of likely voters in Iowa have cast ballots, with Obama leading by 22 points among early voters.
President Obama has a six-point advantage in Ohio, according to a new Wall Street Journal/NBC News/Marist poll.
President Obama tops 50 percent and continues to lead Mitt Romney in Michigan, according to the latest Rasmussen survey of likely voters.
Rasmussen is not the only poll to show the president making incremental gains on Romney nationally.
The Reuters polls show a close race in all four states; the greatest margin is Obama's 5-point lead in Virginia.