Because his views on economics and the way the federal government affects economic matters in this country would actually be helpful to the bottom 70% of the population and not the liberal media/federal establishment, so he is completely ignored by the media
great point. Everything you see on TV is delivered to you by millionaires. Everyting you see on TV is delivered to you by large int'l corporations.
And, millionaires & large corporations are best served by policies of Romney, Cain and Perry. Hell, Cain was sponsored by Koch brothers for the last 5 years, Perry made HPV immunizations required by exec order and his chief of staff and 2012 PAC leader got millions, and ROmney spent 25 years working for wall street.
These candidates - just like Obama - work for the rich. That's why TV stations love them. If you're heavily influenced by Sean Hannity or Chris Mathews, you love a big business candidate.