they are. they re dealing with new defiance of multiple witnesses who refused to appear before correspondents today. what are you hearing from impeachment investigators about these witnesses and the road ahead? reporter: wolf, democrats set out an ambitious schedule this week but they re not getting much cooperation. yesterday, four white house officials defied subpoenas, including john eisenburg from the national security council and the complaints about the push to investigate the president s political rivals and the ukraine investigation complaints raised to mitchell eisenburg. he was involved in that effort to push for the transcript of the july phone call between president trump and the president of ukraine about biden. and the former national security