National Security Council staffers uneasy, fear Trump backlash

Washington (CNN) — Lt. Col. Alexander Vindman departed Capitol Hill after dark on Tuesday after spending more than 10 hours detailing his concerns at President Donald Trump's handling of foreign policy. The next morning he returned to his desk as Trump's top Ukraine expert.
The swift return to work for one of the impeachment inquiry's central witnesses -- who the President and his allies decried as a "never-Trumper" with ulterior motives, even as he remains on the President's National Security