An old pro , Biden knows how to play to seniors , women and the middle class . Paul Ryan : two debates in two weeks have transformed presidential race . Gergen says the polls have tightened , partisans on both sides are fired up . GOP poll gave a slight edge to David Gergen ; Gergen says he had edge on style . Gergen : two weeks 's town hall debate looks increasingly important .
Paul Ryan : two debates in two weeks have transformed presidential race . Gergen says the polls have tightened , partisans on both sides are fired up . GOP poll gave a slight edge to David Gergen ; Gergen says he had edge on style . Gergen : two weeks 's town hall debate looks increasingly important .