Army Lt. Col. Yevgeny Vindman, whose brother Alex was a star witness in the House impeachment inquiry, is set to be promoted to colonel after overcoming alleged retaliation efforts by the Trump White House, a person familiar with the matter said.Army Lt. Col. Yevgeny Vindman, whose brother Alex was a star witness in the House impeachment inquiry, is set to be promoted to colonel after overcoming alleged retaliation efforts by the Trump White House, a person familiar with the matter said.