Clinton: Like Rocky, I won't quit

She's eagerly taken on the persona of scrappy underdog, and she was speaking to labor leaders in Philadelphia.

So it just had to happen: Hillary Clinton compared herself today to Rocky.

She told AFL-CIO members that withdrawing from the Democratic nomination race now would be going only halfway up the steps of the Philadelphia Museum of Art -- recalling the signature scene from the 1976 movie about the boxing champion from nowhere.

"That's not the way it works," she said. "Let me tell you something, when it comes to finishing a fight, Rocky and I have a lot in common. I never quit."

Not content to let Clinton have that moment, the Republican National Committee pointed out that Sylvester Stallone -- who played Rocky Balboa in the original and in more sequels than most moviegoers care to remember -- is supporting John McCain.