Support WBURVindman, Key Impeachment Witness, Retires Over 'Bullying, Intimidation' By TrumpLaurel WamsleyJuly 08, 2020 ShareArmy Lt. Col. Alexander Vindman arrives on Capitol Hill in October as part of the impeachment inquiry. Controversy has grown over an abnormal stall in Vindman's promotion to the rank of full colonel. (AP)