John Robert Bolton II (born November 20, 1948) is an American attorney, diplomat, Republican consultant, and political commentator who served as the 25th United States ambassador to the United Nations from 2005 to 2006, and as the 26th United States national security advisor from 2018 to 2019. Bolton served as a United States assistant attorney general for President Ronald Reagan from 1985 to 1989. He served in the State Department as the assistant secretary of state for international organization affairs from 1989 to 1993, and the under secretary of state for arms control and international security affairs from 2001 to 2005. He was an advocate of the Iraq War as a Director of the Project for the New American Century, which favored going to war with Iraq.
