Lt. Col. Vindman responds to Nunes addressing him as "Mr. Vindman" in exchange about whistleblower

During a discussion about the whistleblower at Tuesday's hearing, California Congressman Devin Nunes, the top Republican on the House Intelligence Committee, called Army Lt. Col. Alexander Vindman "Mr. Vindman" while questioning him in the third day of public impeachment hearings. "Ranking member, it's Lt. Col. Vindman, please," he responded.