PJ Media

In a way, conservative and liberal blogs both became a locus for ideas and information that was ignored or misreported by the main stream media.

Conservatives rallied to fight the liberal bias of the media – especially in the 2004 presidential campaign.

Liberals already have the media promoting their ideas, which may be why the left wing blogs are far more extreme than the conservative blogs. Only the more extreme left is unrepresented in the MSM, so they are the ones spending energy on the web.