I have decided that I like the phrase "Corporate Media" better than I like the phrase "mainstream media". Most of our media is controlled by large corporate conglomerates, like Disney or GM, which have agendas that often contradict with the goal of truthful dissemination of information. It is why the "evening news" has become "infotainment". And it is why candidates that don't support American hegemony are barred from debates.
Well, the internet giveth when the television taketh away.
Here is Bill Moyers interviewing Dennis Kucinich and Ron Paul
I think America has become too spoon fed when these contrariaen voices ar silenced.