A new National Public Radio poll, which had President Obama leading Mitt Romney 51 percent to 44 percent four weeks ago, now has Mitt Romney on top, 48 percent to 47 percent, with the Republican benefiting from his debate performances.

The poll found that among likely voters, 34 percent said Romney’s debate performances made them more likely to vote for the challenger while 28 percent said they now are more likely to vote for the president. Among critical independent voters, though, Romney won big, with 37 percent saying they are now more likely to chose him compared to 21 percent for Obama.