Politics & World • Politician

John Bolton

John Robert Bolton is an American lawyer, diplomat, political commentator, and former government official.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

John Robert Bolton is an American lawyer, diplomat, political commentator, and former government official. He served as the United States ambassador to the United Nations from 2005 to 2006 and as national security adviser to President Donald Trump from 2018 to 2019. Bolton is known for his hawkish foreign-policy views and later became a prominent critic of Trump.

Early life and education

John Bolton was born in Baltimore, Maryland, in 1948. Sources identify him as a Yale alumnus and a lawyer who later entered public service.

Government career

Bolton held senior roles in Republican administrations, including under secretary of state for arms control and international security and U.S. ambassador to the United Nations. He served as interim U.S. ambassador to the United Nations from 2005 to 2006 and as national security adviser to President Donald Trump from April 2018 to September 2019.

Views and public profile

Bolton is described as a hawkish foreign-policy conservative and a supporter of American interventionism. He became a prominent public critic of Donald Trump after leaving the administration.

Memoir and later controversy

Bolton published the memoir The Room Where It Happened in 2020. In 2025, his home and office were searched in a classified-documents investigation, and he was later indicted, according to Britannica and later reporting.

Key facts

Bolton served as interim U.S. ambassador to the United Nations from 2005 to 2006.
He was national security adviser to President Donald Trump from April 2018 to September 2019.
He wrote the memoir The Room Where It Happened, published in 2020.
Bolton is widely identified with hawkish and interventionist foreign-policy views.
In 2025, his home and office were searched in a classified-documents investigation, and he was later indicted.

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Canadian context

Bolton is relevant to Canadian readers because his views and appointments affected U.S. foreign policy, NATO-related debates, and relations with allies, including Canada.

Frequently asked questions

Who is John Bolton?

John Bolton is an American lawyer, diplomat, political commentator, and former government official best known for serving as U.S. ambassador to the United Nations and national security adviser to President Donald Trump.

What positions did he hold in government?

He served as U.S. ambassador to the United Nations from 2005 to 2006 and as national security adviser from 2018 to 2019. He also held senior arms-control and security posts in earlier Republican administrations.

What is John Bolton known for politically?

He is known for hawkish, interventionist foreign-policy views and for supporting a strong U.S. role abroad. Sources also describe him as a prominent conservative critic of multilateral agreements.

Did John Bolton write a book?

Yes. He wrote The Room Where It Happened, a memoir about his time in the Trump administration, published in 2020.

Was John Bolton involved in legal controversy?

Yes. Britannica reports that in 2025 his home and office were searched in a classified-documents investigation, and he was later indicted on related charges.

References

Encyclopaedia Britannica — https://www.britannica.com/biography/John-Bolton
Supports: Birth details, career summary, Trump administration role, memoir, and 2025 investigation/indictment reporting
U.S. Studies Centre — https://www.ussc.edu.au/a-conversation-with-former-national-security-advisor-ambassador-john-bolton
Supports: Former National Security Advisor role, UN ambassadorship, and private-practice background
U.S. Department of State — https://2001-2009.state.gov/outofdate/bios/b/53920.htm
Supports: Appointment and term as U.S. Permanent Representative to the United Nations
Wikipedia — https://www.wikipedia.org/
Supports: General career chronology and book title used only to corroborate broad factual framing