Presidential campaign slogans: we’ve come to know them, love them, loathe them, and in some cases, completely forget them.  Some slogans, like Warren G. Harding’s “Cox and Cocktails,” sound perplexing in hindsight. Others, like Jimmy Carter’s “Not Just Peanuts” slogan, seem sweetly naïve thirty years later.  And then there’s President Obama’s new slogan, simply “Forward.” What does it mean? Kathleen Hall Jamieson  specializes in political language and rhetoric. She’s a professor of communications and the director of the Annenberg Public Policy Center at the University of Pennsylvania.