According to this post at MediaBistro (2/10/11), CNN is adding three new contributors. Two are right-wingers: Dana Loesch, a Tea Party radio host and editor of Andrew Breitbart's BigJournalism website. Will Cain is a commentator at the National Review website. And the "left"? His name is Cornell Belcher, a pollster and advertising/messaging consultant for various Democrats. 

Beyond the 2-1 numerical tilt in favor of the right,  this is a good example of how corporate media often pick their pundits. The right-wingers are true believers, drawn from the ranks of the conservative media world. TV leftists are generally not well-known advocates for the left, familiar to Democratic party insiders. That is the type of left/right debate they prefer.