Ranking member Rep. Devin Nunes of Calif., and Steve Castor, the Republican staff attorney, right, talk as former White House national security aide Fiona Hill, and David Holmes, a U.S. diplomat in Ukraine, testify before the House Intelligence Committee on Capitol Hill in Washington, Thursday, Nov. 21, 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.(AP Photo/Susan Walsh)