Schwarzenegger for the Left?

Lately, there has been a lot of talk about the place of "Hollywood liberals" in political ads, doing political speaking engagements and raising money for candidates. It seems the Right just can't get enough of trying to undermine the credibility of well-known people who use their celebrity to promote causes in which they believe. Rush Limbaugh's recent comments about Michael J. Fox "faking" Parkinson's tremors is just one example that epitomizes the Right's fear of the power of stars. But the question remains, "Why don't the Democrats capitalize on stars more?" When the GOP basically owns the mainstream media, including most "liberal" Hollywood film studios, it would seem only a matter of simple strategy for the Left to use one of its great assets.