Sunday on 'This Week': Robert Gibbs and Kevin Madden

NEW YORK, JULY 27, 2012— -- This Sunday, Obama campaign senior adviser Robert Gibbs squares off with Romney campaign senior adviser Kevin Madden in an exclusive "This Week" debate on the latest in the 2012 presidential contest.

As presumptive Republican presidential nominee Mitt Romney hits the international stage, he stumbles diplomatically by criticizing London's preparation for the Olympics. Did Romney offend a U.S. ally in his first major overseas trip? Can he make his case to be commander-in-chief as he travels to Israel?

Back in the U.S., the Romney campaign continues hammering President Obama's comments about businesses. Are they taking him out of context, or did the president question the work of entrepreneurs? Plus, how will the debate over whether to extend the Bush tax cuts for the wealthy impact the presidential race?

Obama adviser Robert Gibbs and Romney adviser Kevin Madden face off on the 2012 election, only on "This Week" Sunday, hosted by ABC News political analyst Matthew Dowd.

Then, the powerhouse roundtable debates all the week's politics, with ABC News' George Will; Democratic strategist and ABC News contributor Donna Brazile; Yahoo! News Washington bureau chief David Chalian, radio host and Brietbart.com contributing editor Dana Loesch, and Washington Post columnist Ruth Marcus.

With just 100 days until Election Day, both candidates are on the defensive, with their negative ratings at historic highs. Will the latest skirmishes on the campaign trail have a lasting impact on the race, or are they a distraction from major issues? And as attack ads continue to fill the airwaves, has Gov. Romney allowed the Obama campaign to define him over the summer, rather than aggressively presenting his case for election?

Plus, ABC News senior political correspondent Jonathan Karl speaks exclusively to former Vice President Dick Cheney, in his first interview since his heart transplant in March. The former vice president weighs in on the 2012 election, plus his advice to Mitt Romney on his vice presidential pick.

And "This Week" takes its weekly trip down memory lane in "What Year Was It?" See the whole political picture, Sunday on "This Week."