John Bolton
27th United States National Security Advisor
In office April 9, 2018 – September 10, 2019
President	Donald Trump
Deputy	Ricky L. Waddell
Preceded by	H. R. McMaster
Succeeded by	Robert C. O'Brien
25th United States Ambassador to the United Nations
In office August 1, 2005 – December 9, 2006
President	George W. Bush
Secretary-General	Kofi Annan
Preceded by	John Danforth
Succeeded by	Zalmay Khalilzad
3rd Under Secretary of State for Arms Control and International Security
In office May 11, 2001 – July 31, 2005
President	George W. Bush
Preceded by	John D. Holum
Succeeded by	Robert Joseph
18th Assistant Secretary of State for International Organization Affairs
In office May 5, 1989 – January 19, 1993
President	George H. W. Bush
Preceded by	Richard S. Williamson
Succeeded by	Douglas J. Bennet
Personal details
Born	John Robert Bolton (1948-11-20) November 20, 1948 (age 75) Baltimore, Maryland
Political party	Republican
Spouse(s)	Gretchen Bolton
Children	Jennifer Sarah Bolton
Alma mater	Yale University (B.A, J.D)
Profession	Lawyer, diplomat
Military service
Branch/service	United States Army
Unit	Maryland Army National Guard

John Robert Bolton (born November 20, 1948) is an American lawyer and diplomat. He was the 27th United States National Security Advisor from April 9, 2018 through September 10, 2019. He has served in several Republican administrations. Bolton served as the U.S. ambassador to the United Nations from August 2005 until December 2006 as a recess appointee by President George W. Bush. John Bolton advocated the second war with Iraq. He resigned in December 2006.

On March 22, 2018, President Donald Trump announced his appointment as National Security Advisor, to take office on April 9, 2018.