Media Matters for America (MMfA) has been called many things. "Liberal media propaganda outlet." "A "propagandist" organization. "Partisan activists." And, of course, much worse.
Nothing surprising here. The organization's mission statement, after all, declares that it comes at the world from an angle. "Media Matters for America is a Web-based, not-for-profit, 501(c)(3) progressive research and information center dedicated to comprehensively monitoring, analyzing, and correcting conservative misinformation in the U.S. media."