about former vice president joe biden and his son. that's according to two people familiar with his testimony today. kurt volker who resigned last week after being named in the whistle-blower complaint that sparked the house impeachment inquiry of trump said he tried to caution giuliani that his sources including ukraine's former top prosecutor were unreliable and that he should be careful about putting faith in the prosecutor's story said the people who spoke anonymously. volker's testimony offering the first inside account of the trump administration's efforts to press for ukrainian investigation into trump's political rival. phil rucker, this testimony today that you and your colleagues just reported on as we sat down seems to put volker on the side of tom bosser, the former homeland security adviser who spoke out sunday on on abc sunday program saying that they desperately tried to get through to donald trump who was consumed by and taken with these delusions about what the trump