Douglas Abbott Macgregor (born January 4, 1953) is a retired U.S. Army Colonel and government official, and an author, consultant, and television commentator. In 2020, President Donald Trump proposed Macgregor as ambassador to Germany, but the Senate blocked the nomination. On November 11, 2020, a Pentagon spokesperson announced that Macgregor had been hired to serve as Senior Advisor to the Acting Secretary of Defense, a post he held for less than three months.