Kurtz brief history on where these" pundits" come from and other partisan hackery: here
The commentariat is increasingly populated by political refugees. From Bush 41's White House and campaign, Tony Snow joined Fox, Mary Matalin went to CNN and Bill Kristol, who happily advises the current administration, launched the Weekly Standard. From the Hill, Newt Gingrich became a Fox commentator, his spokesman Tony Blankley took over the Washington Times editorial page, and former Republican congressman Joe Scarborough became an MSNBC talk show host. From the Clinton White House, George Stephanopoulos became host of ABC's "This Week," Dee Dee Myers signed with NBC and Vanity Fair, and Carville and Begala joined CNN.