(Shawn Thew | AP file photo) Ranking member Rep. Devin Nunes of Calif., left, and Steve Castor, the Republican staff attorney, right, speaking during testimony by Jennifer Williams, an aide to Vice President Mike Pence, and National Security Council aide Lt. Col. Alexander Vindman, before the House Intelligence Committee on Capitol Hill in Washington, Tuesday, Nov. 19, 2019, during a public impeachment hearing of President Donald Trump's efforts to tie U.S. aid for Ukraine to investigations of his political opponents.