President Donald Trump said Tuesday Google GOOG, -0.86% GOOGL, -0.83% , Twitter TWTR, -1.11% and Facebook FB, -0.68% "better be careful," following charges he has made about social-media companies discriminating against conservatives. Speaking in the Oval Office, Trump said the three companies are "treading on very, very troubled territory." Earlier, Trump said Google had "rigged" search results against him. The company said in a statement it does not bias its results toward political ideology.
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