Rep. Nadler on Mueller Investigation

House Judiciary Committee ranking member Rep. Jerrold Nadler, D-N.Y., arrives for a House Judiciary hearing on Capitol Hill in Washington, Thursday, Dec. 7, 2017.

U.S. Rep Jerrold Nadler(D, NY-10), ranking member on the House Judiciary Committee, talks about the Mueller investigation and the president's tweeted demand for "the Department of Justice look into whether or not the FBI/DOJ infiltrated or surveilled the Trump Campaign for Political Purposes."  Rep. Nadler maintains that demand violates norms and is in itself obstruction of justice through intimidation.