I recently read an article in The Wichita Eagle; "Politics of Late-night TV".
The article points out that in recent years, the line between politicians and entertainment has blurred. According to the article, politicians use to avoid ever going on late night talk shows, such as Johnny Carson. That has changed and now politicians count on talk shows to get publicity and it seems to be more positive for them to do that. I would point out that it also works the other way. The nightly and morning news casters, who come on at 5:30pm, or 7:00am (Central Time here) often cover their own networks TV shows for news, such as Dancing With The Stars.
I've noticed more and more that entertainment, culture, news and politics overlap. We can see that here on Counter-culture Journals. We are mostly about culture and entertainment. But often there are political types of culture and entertainment. We can't keep them completely separated.