Robert Costello, the former legal advisor to ex-Trump attorney Michael Cohen, appeared before the grand jury in the Manhattan District Attorney’s investigation into former President Trump Monday, and testified that Cohen is a "serial liar." Costello said he testified to the grand jury Monday that Trump did not know about the payments made by Cohen to Stormy Daniels. "There can be no doubt in anyone’s mind that Michael Cohen has great difficulty telling the truth," Costello said. "He is, after all a convicted perjurer, and our track record with Mr. Cohen convinced us that he was a serial liar." Cohen's...