Witnesses up are 2 veteran diplomats acting u. S. Ambassador to ukraine William Taylor and Deputy Assistant secretary of state george cant a tailor has said in closed door testimony he had what he calls a clear understanding the trump wanted to pressure ukraine into investigating his political rival joe biden in exchange for continuing military aid to ukraine cant testify the trumps lawyer Rudy Giuliani pushed for the removal of the former u. S. Ambassador to ukraine marie avantage who will testify on friday the president denies any wrongdoing and says the inquiry is in his words the greatest witch hunt in american history. Kimberly how kate is at the white house and castro is on capitol hill for us where that hearing is of course taking place well be talking to both of them in just a few minutes but 1st patty cohan begins our coverage. From a most the 1st day of his presidency there have been calls for Donald Trumps impeachment. But for the 1st 2 years with his party in control of con