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Founded in 2007 by the Tampa Bay Times, PolitiFact.com utilizes reporters and editors from the Times and affiliated media outlets to “fact-check statements by members of Congress, the White House, lobbyists and interest groups”.
Melissa Zimdars, assistant professor of communication and media at Merrimack College, has made a list of more than a hundred problematic news sites, along with tips for sorting the truthful from the troublesome.