A simple point

The Confederate Battle Flag is a symbol not only of virulent racism, but of anti-Americanism, of aggressive ignorance, and of pathetic loserdom.

Using it as metonymic for a class of people is insulting to those people. If Dean can't think of a better term for "people in the South who get shafted by screw-the-poor policy" than "guys with Confederate flags in their trucks", he doesn't deserve to be my elected representative.

Just fact-checking some facts

According to the transcript of selected remarks at the Washington Post, Bill Clinton did not say "I did not have sex with that woman, Miss Lewinsky." What he actually said was "I did not have sexual relations with that woman, Miss Lewinsky". (He made the remark after a short press opportunity about an education initiative on January 26, 1998.