Viewers, beware. Presidential dates, sad to say, aren’t always exercises in scrupulous political honesty. Fact-checkers usually tag dubious claims a day or two later. But here, drawing on three of my favorite truth-squadders -- factcheck.org,. politifact.com, and the Washington Post’s Fact Checker -- is a day-of-the-debate guide to arm viewers against attempts to lead them down a deceptive path.
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