Media Matters for America is an aggressively liberal nonprofit that claims the mainstream media deliberately promotes “conservative disinformation” and must be exposed in order to protect a gullible public. The group is headed by David Brock, a former conservative journalist who switched sides and now targets his former allies using donations from George Soros and other wealthy liberal activists and foundations. * * * NOTE: Media Matters purports to fight "conservative misinformation." The typo was discovered long after publication.