Open: This is Face the Nation, May 19

The latest on the Benghazi, IRS and AP leak investigations with White House senior advisor Dan Pfeiffer, Sen. John Cornyn, R-Texas, Rep. Jason Chaffetz, R-Utah, and Associated Press President and CEO Gary Pruitt. Then a roundtable discussion on all of that and more with the New York Times' David Sanger, POLITICO's Lois Romano, The Washington Post's Dan Balz and CBS News Political Director John Dickerson.