A SurveyUSA poll released today shows Obama’s lead in North Carolina shrinking to 5 points. The same poll had him up by 9 a week earlier. This comes on the heels of a PPP poll that showed Obama’s lead cut in half to 12 percent, down from the 25 point lead he had the weekend before the Pennsylvania primary. Neither of these polls reflect any damage that may have come from Jeremiah Wright’s media tour, or boost that Hillary Clinton may have gotten from Gov. Easley’s endorsement. A longshot win for Clinton in North Carolina, which remains a remote possibility, would seriously damage Obama’s prospects. But even if she is able to cut his victory margin into the single digits in North Carolina, while pulling off a win in Indiana, it will help her claim a legitimate momentum shift in the race.