From the New York Times' Matt Bai:

I was surprised to find that a friend of mine, a lifelong Democrat who had been pledging his allegiance to Barack Obama all year, had stepped into the voting booth and suddenly changed is mind. He voted, instead, for Hillary Clinton, and here’s why: he’d watched that video online —you know, the one starring celebrities like will.i.am, Scarlett Johansson and Herbie Hancock—and he thought it made Obama look Hollywood smug, as if supporting him were this year’s version of wearing an AIDS ribbon on your lapel. My friend didn’t want anything to do with the latest chic cause, and he just couldn’t bring himself to pull the lever for the guy who now symbolized the things he liked least about Democratic politics, starting with all those stars who think they know more about America than the people who live in it.

Of course, this is but a single instance (which in marketing terms, is good enough to launch a national campaign). Still, I think we'll see a lot more of this...but with so much of the electoral abjectly surrendering to their irrational impulses, it make take a while.