When Is Entertainment Too Political?

WHEN IS ENTERTAINMENT TOO POLITICAL?
[SOURCE: AdAge, AUTHOR: Ira Teinowitz]
As the hubbub mounts over negative political ads, another controversy is emerging over what should count as political advocacy on TV and what is entertainment. Just this week, a Democratic candidate for governor of California challenged an appearance by Gov. Arnold Schwarzenegger on "The Tonight Show" as being akin to a political ad, and broadcast networks rejected an ad for a documentary film about the Dixie Chicks for being too political.
http://adage.com/mediaworks/article?article_id=112814