John Bolton is an American attorney, political commentator, and diplomat who served as the U.S. National Security Advisor under President Donald Trump from 2018 to 2019. A prominent figure in the Republican party, Bolton is known for his hawkish foreign policy views, advocating for assertive U.S. interventionism and a strong stance against perceived adversaries like Iran and North Korea. Prior to his role in the Trump administration, he served as the U.S. Ambassador to the United Nations under President George W. Bush. He is also a frequent contributor to conservative media outlets and has authored several books, including "The Room Where It Happened," which details his experiences in the Trump White House.