From the NYTimes:
Mitt Romney had a message for the protesters who greeted him and Representative Paul D. Ryan, along with 5,000 supporters, here on Saturday morning: “This is kind of like the Greek chorus in the background"... “Everything they do reminds us of Greece and we’re not going to Greece,” Mr. Romney said. “We’re going to get America back to being America.”
I'm sure Romney's prep schooling gave him some background in the classics, so he should remember the function of the Greek chorus (or at least realize Greek dramas of several thousand years ago probably can't be blamed for the country's current economic issues)
So here's a refresher, courtesy of Wikipedia:
"The Greek chorus comments on themes, and...shows how an ideal audience might react to the drama. The chorus also represents, on stage, the general population of the particular story, in sharp contrast with many of the themes of the ancient Greek plays which tended to be about individual heroes, gods, and goddesses.
In many of these plays, the chorus expressed to the audience what the main characters could not say, such as their hidden fears or secrets. The chorus often provided other characters with the insight they needed."
So, if Mitt Romney's chorus was chanting "four more years," then we might conclude that it is what the "ideal audience" or "general population" of this drama wants, or that "four more years" is something Romney knows will happen, but is afraid to say out loud.