Remember when Hillary Clinton said, "Shame on you, Barack Obama"? Mitt Romney does. And he's making that the focal point of his "Shame On You" ad, which alleges that Obama spreads misinformation about Romney the same way he did about Hillary Clinton during the 2008 primaries.
Of course, since the "shame on you" moment, Barack Obama was elected President and Hillary Clinton appointed Secretary of State. Will the reminder of past ugliness lead to awkwardness at the White House?