Greg Reback, of counsel at Carr & Ferrell, discusses growing antitrust concerns surrounding Facebook, which are coming to light in the wake of CEO Mark Zuckerberg's Congressional testimony. Plus, William Banks, a professor at Syracuse University Law School, discusses reports that President Trump considered firing Deputy Attorney General Rod Rosenstein over his involvement in the raid of the offices of Trump's personal lawyer, Michael Cohen. They speak with Bloomberg's June Grasso.