Donald Trump has repeatedly labeled his political opponents liars. He dubbed Senator Ted Cruz (R-TX) Lyin' Ted when it became clear that Cruz was a serious rival for his nomination; he called Senator Marco Rubio (R-FL) an "even bigger liar" than Cruz. He dubbed Dr. Ben Carson a "pathological liar" and said former Florida Governor Jeb Bush's lies were almost as bad as Cruz's. Trump has termed virtually every mildly adversarial media member a liar, too. But there's only one truly massive liar in this race: Donald Trump. When Politico attempted to measure how many lies Trump told over the...