Barack Obama has a statistically insignificant 48 percent to 46 percent lead over John McCain among registered voters with two percent choosing neither and 3 percent undecided in an NBC News/Wall Street Journal survey conducted Sept. 19-22. The margin of error is 3 points and the numbers includes leaners. Obama had led by 3 points in August and by 6 points in July. This poll differs from this week's Washington Post/ABC News and Fox News which both had Obama regaining statistically significant leads.