With Romney leading among independents.

Via Politico:

The presidential race is tight enough nationally that a strong performance in Wednesday’s debate by Mitt Romney could put him in the lead.

A new POLITICO/George Washington University Battleground Poll of likely voters shows President Barack Obama ahead 49 percent to 47 percent, a point closer than a week ago and still within the margin of error.

Romney now leads by 4 points among independents, up slightly from a week ago. The Republican must overperform with that group to make up for the near monolithic support of African-Americans for Obama, as well as the huge Democratic advantage among Latinos and women.