Michael Cohen (L), Donald Trump (R) Getty/Getty Donald Trump is suing his niece Mary Trump and The New York Times over coverage of his taxes. Michael Cohen suggested the lawsuit could backfire if Donald Trump is forced to do a deposition. Cohen said his former boss's depositions were the "dumbest written paper that you've ever seen." See more stories on Insider's business page. Michael Cohen, Donald Trump's former personal attorney and fixer, suggested Mary Trump could make her uncle's "ridiculous" lawsuit backfire by making him do a deposition.The former president has sued his niece, The New York Times, and three reporters for $100 million over an investigation by the paper into his tax records."If I was Mary Trump and her lawyer, I would turn around and say, don't fight this, just answer the complaint and look for depositions, let's look for discovery," Cohen said while appearing on MSNBC on Saturday."Because one thing for certain, and I have read dozens of Donald Trump depositions, they are the dumbest written paper that you've ever seen.