This is quite evident on KPFA, a Leftist radio station from Berkeley. They never take callers, and their dialogue consists of a lefist interviewee and a leftist interviewer. As a result, they do not even register in Arbitron ratings, even in the Left stronghold of the Bay Area.
Communism had the same problem. Once, satellite TV and the Internet came about, it was hard to hide the success of the capitalists and even harder to hide the truth about communism and freedom. The communists(Democrats) in this country have actually done a excellent job in brainwashing the mass and controlling the media. 9