NEW YORK – With a nod to his basketball star host, Michael Jordan, President Barack Obama used a sports analogy at a fundraiser in New York on Wednesday to describe the election campaign and his opponents, who he said played "dirty.”"I can’t resist a basketball analogy. We are in the fourth quarter, we’re up by a few points, but the other side is coming strong and they play a little dirty,” Obama told a group of supporters, saying his team was ahead but had some injuries."I’d say there’s about seven minutes to go in the game. And Michael’s competitiveness is legendary, and nobody knows better than Michael that if you’ve got a little bit of a lead and there’s about seven minutes to go, that’s when you put them away.”Obama and his presidential rival, Republican Mitt Romney, have been locked in an increasingly negative campaign for months and both sides have accused the other of divisive moves.Romney, the former governor of Massachusetts, is raising more money from donors than Obama and has greater support from outside groups known as "Super PACs,” which have poured millions into negative advertising before the Nov. 6 election.Obama, an avid basketball player himself, joked that Jordan, a former star player for Obama’s hometown Chicago Bulls, and the other players at the event were dwarfing his star power.About 120 people attended the fundraising dinner, dubbed the "Obama Classic,” at a cost of $20,000 a person.