Here's the section of the program where he mentions previous Impeachment Trial witnesses:
Thanks. I subscribe to his podcasts and listened to this one, but I absorb so much of this stuff from him, Levin, Rush, Hannity, Ingraham and others, that it gets hard to remember it all...
He’s got it wrong. There were depositions furnished from BEFORE the trial which were played for the Senate. There were no IN PERSON witnesses.