In a new USA TODAY/Gallup Poll of swing states, an overwhelming majority of voters remember seeing campaign ads over the past month; most voters in other states say they haven't. In the battlegrounds, one in 12 say the commercials have changed their minds about President Obama or Republican Mitt Romney — a difference on the margins, but one that could prove crucial in a close race.
At this point, Obama is the clear winner in the ad wars. Among swing-state voters who say the ads have changed their minds about a candidate, rather than just confirmed what they already thought, 76% now support the president, vs. 16% favoring Romney.
Swing states poll: A barrage of TV ads, but only in the battlegrounds