Story highlights S.E. Cupp: Clinton response on big speaker fees explains why young flock to Sanders

She says Sanders appeals because he's authentic, like an activist

Clinton seems more packaged, like a salesman, Cupp says

S.E. Cupp is the author of "Losing Our Religion: The Liberal Media's Attack on Christianity," co-author of "Why You're Wrong About the Right" and a columnist at the New York Daily News.

(CNN) At CNN's Democratic town hall this week, Hillary Clinton highlighted the biggest problem for her campaign in one answer: "That's what they offered."

The question was why she took a whopping $675,000 fee to speak to the Wall Street giant Goldman Sachs. To be sure, for a once-proclaimed moderate and newly branded progressive, there is no good answer to this question. But as bad ones go, the only worse response would have been "because I really, really love money."

Particularly as Hillary struggles to get out in front of the formidable challenge from Bernie Sanders.

But it's not just the dissonance between her record and her image that is giving Bernie oxygen in what should have been a much easier primary. It's that he is cool. And she is not.

That's not my opinion, mind you. I am not cool, nor do I pretend to know what is cool. But the standard-bearing arbiters of cool -- millennials, or people whose souls have yet to be crushed by later life -- do know. And they have anointed Bernie as the ultimate hipster.