Josh Blackman, a professor at the South Texas College of Law, discusses why a New York court has thrown out a case against President Trump for defamatory tweets, calling the suit "too vague." Plus, Bradley Moss, a partner at Mark Zaid Plc, discusses House testimony by deputy attorney general Rod Rosenstein, who will face tough lawmaker questions from both sides of the aisle over DOJ involvement in Robert Mueller's Russia probe. They speak with Bloomberg's June Grasso.