Media Matters for America
Media Matters for America is a politically progressive media watchdog with a stated mission of "comprehensively monitoring, analyzing, and correcting conservative misinformation in the U.S. media". Set up as a tax-exempt, nonprofit organization, MMfA was founded in 2004 by journalist and political activist David Brock. It is known for its aggressive criticism of conservative journalists and media outlets, including its "War on Fox News. Wikipedia*
On the C-SPAN Networks:
Media Matters for America has hosted 1 event in the C-SPAN Video Library; the first program was a 2010 Public Affairs Event.