Sanders campaign dislikes comparisons to Howard Dean

USA Today is reporting that staffers from the Bernie Sanders campaign are dismissing comparisons of their guy to Howard Dean, who ran a flame-out effort for president in 2004.

Let's see. Both men are originally from New York and then moved to Vermont. They're both left-wing radicals.

Why are Sanders' people upset? Is it because Sanders, like Dean in '04, has no chance of winning the presidency?