Roy Cohn – who was the mob-connected personal attorney for Donald Trump when he was a New York real estate mogul — played a major influence in shaping the former president’s relationship with the legal system. But one legal expert thinks Trump’s adherence to Cohn’s strategies could be his undoing. According to an interview that former assistant U.S. Attorney James Zirin conducted with Slate’s Andrea Bernstein, the ex-president is currently deploying Roy Cohn’s playbook in his multiple ongoing criminal prosecutions. As an example, Zirin noted that one cornerstone of Cohn’s philosophy was to try…