According to a newly released General Accounting Office report prepared at the request of Senator John McCain, broadcasters and cable operators own most cable networks and "cable networks affiliated with these companies are more likely to be carried by cable operators than nonaffiliated networks." Moreover, in programming those cable networks, these concentrated media conglomerates favor their own in-house TV production over programs from independent producers.
Thanks to Senator McCain for asking for this report that confirms that not only are the broadcast networks shutting out independent creative voices, so are their cable brethren.