Melber: Lt. Col. Vindman was most devastating witness we've seen to date
03:54MSNBC's Ari Melber talks about Lt. Col Alexander Vindman's testimony at the impeachment inquiry and how his character and directness make him difficult to impune.
MSNBC's Ari Melber talks about Lt. Col Alexander Vindman's testimony at the impeachment inquiry and how his character and directness make him difficult to impune.