Mitt Romney has signaled the media and the GOP conservative base that media bias is an issue in the campaign.  In a Breitbart TV interview (view here),  he dropped the phrase, quite consciously:

"There will be an effort by the quote vast left wing conspiracy to work together to put out their message and to attack me"

This is a very positive sign. Mitt knows how to play hard ball. Let the smarter among the left wing media minions think about it.