Who checks Twitter's POTUS fact-checker? Biased head of Twitter's 'Site Integrity' .
• https://www.dailymail.co, By EMILY CRANEWho checks Twitter's POTUS fact-checker? Biased head of Twitter's 'Site Integrity' has previously called the President 'a racist tangerine', the administration 'Nazis' and compared Kellyanne to Joseph Goebbels