Paul Harris: If Obama had the election sewn up, then mocking Romney's Sesame Street gambit might raise a smile. But he doesn't

Paul Harris: Romney releases lengthy video featuring footage of Denver debate while Obama trues to portray rival as dishonest

Paul Harris: Of all the thuggish negative adverts in this cycle, the most brutal is one that simply plays Mitt Romney's '47%' words back at him

Paul Harris: After the Republican challenger's remarks about 47% of Americans, both sides have rushed out hard-hitting adverts

Harry J Enten: When you look at the arithmetic of the electoral college, the Republican nominee's media buying really narrows his chances

Bob Garfield and Brooke Gladstone: Enjoying this election year's crop of political ads? We neither. But for the sake of truth in advertising, we reviewed them for you

Paul Harris: A Romney ad's complaint against the Obama Super Pac spot is right: it was mean and unfair. Welcome to US politics 2012, Mitt

Paul Harris: Fueled by Super Pacs, the big ad spend has begun in earnest. Dominating the airtime are attacks on Obama's 'doing fine' gaffe

Paul Harris: Picking up on a gaffe at a presidential press conference, this attack ad hits Obama hard on the battleground of the economy

Paul Harris: Black Americans voted overwhelmingly for Barack Obama in 2008. Now he's appealing to them again in a targeted radio ad

Paul Harris: A new Obama campaign ad knocks Romney's economic record as governor, but it's Obama's record as president that's at stake

Paul Harris: The new ad from Karl Rove's Crossroads GPS Super Pac is masterfully crafted to undermine Obama's core appeal

Paul Harris: In his first official ad of the presidential election campaign, the presumptive Republican candidate seeks to remould his image

Paul Harris: The new ad that attacks Obama from Rove-founded Super Pac Crossroads GPS is unfair, of course, but fiendishly effective

Paul Harris: Still refining its attack lines against Republican Mitt Romney, Team Obama fluffs a good punchline with over-busy messaging

Paul Harris: Aiming square at Romney, the president's Super Pac ad lays the blame for high gas prices on the presumed Republican nominee

Paul Harris: Less a campaign ad to woo wavering voters, this 16-minute film reminds the Obama faithful why they have to do it all over again

Paul Harris: An attack ad aimed at Sarah Palin as a far-right Republican is a cheap shot, but think of it as just a warm-up routine for the fall