Tenure
In February 2017 President Trump interviewed Bolton and three others to determine who would fill the position of National Security Advisor vacated by Lt. Gen. Michael T. Flynn. The position ultimately went to H. R. McMaster. Trump "made a point on Monday of praising Mr. Bolton and saying that he would find a position for him in his administration eventually." Bolton was seen at the White House on the evening of March 6, 2018, presumably to be interviewed as a candidate for national security adviser.
The New York Times reported on March 22, 2018, that John Bolton would replace National Security Adviser H. R. McMaster, which was confirmed by Trump in a tweet later that day. Bolton began his position as National Security Advisor on April 9, 2018. The New York Times wrote that the rise of Bolton and Mike Pompeo, coupled with the departure of Rex Tillerson and General McMaster, meant Trump's foreign policy team was now "the most radically aggressive foreign policy team around the American president in modern memory", and compared it to the foreign policy team surrounding George W. Bush, notably with Dick Cheney and Donald Rumsfeld.
On April 10, 2018, Homeland Security Advisor Tom Bossert resigned at Bolton's request, and Bolton said he was considering a merger of the NSC with the Homeland Security Council. During his first week in office Bolton requested and obtained the resignations of multiple National Security Council (NSC) employees including NSC spokesman Michael Anton (April 8), deputy national security adviser Nadia Schadlow (April 10), and deputy national security adviser Ricky L. Waddell (April 12). CNN reported in September 2018 that Bolton had significantly shrunk the number of NSC personnel, cutting it to under 300.
In April 2018, Bolton pressed President Trump to withdraw from the Iran Nuclear Deal, which Trump did a month later.
The Huffington Post reported that on May 8, 2018, Bolton removed Timothy Ziemer and dissolved his Global Health Security team formerly on the NSC leaving the administration's high level preparation for and ability to respond to pandemics, infectious disease, and other biological threats unclear. The choice to remove and not replace Ziemer in the midst of an emerging Ebola outbreak in The Democratic Republic of Congo was criticized in several news outlets.
On September 10, 2018, in his first major address as National Security Advisor, Bolton criticized the International Criminal Court, saying it lacks checks and balances, exercises "jurisdiction over crimes that have disputed and ambiguous definitions," and has failed to "deter and punish atrocity crimes." Calling the ICC a threat to "American sovereignty and U.S. national security," Bolton said it is "superfluous," given that "domestic judicial systems already hold American citizens to the highest legal and ethical standards." He added that the U.S. would do everything "to protect our citizens" should the ICC attempt to prosecute U.S. servicemen over alleged detainee abuse in Afghanistan, and it would bar ICC judges and prosecutors from entering the U.S. and sanction their funds. He also criticized Palestinian efforts to bring Israel before the ICC over allegations of human rights abuses in the occupied West Bank and Gaza.
In 2018, Bolton requested that the Pentagon provide the White House with options for military strikes against Iran. According to the New York Times, Bolton "intensified the administration's policy of isolating and pressuring Iran—reflecting an animus against Iran's leaders that dates back to his days as an official in the George W. Bush administration. As a private citizen, he later called for military strikes on Iran, as well as regime change."
In November 2018, Bolton said that an audio recording related to the assassination of Jamal Khashoggi did not prove that Saudi Arabian Crown Prince Mohammed bin Salman ordered the murder.
As National Security Advisor, Bolton eliminated the kinds of internal policy debates that his predecessor H. R. McMaster had in place. The New York Times writes that this change in practices contributed to Trump's sudden decision to withdraw the United States from Syria in January 2019.
As National Security Advisor, Bolton advanced policies skeptical and hostile toward international organizations. By his first year as National Security Advisor, Bolton had reshaped the National Security Council and become influential within the Trump Administration.
By May 2019, Trump had undercut some of Bolton's major hard line positions, stating he was not seeking regime change in Iran and contradicting Bolton's assertion that North Korea had recently violated United Nations resolutions by testing new short-range missiles.
In late August 2019, Bolton met Alexander Lukashenko in Minsk, Belarus.
On September 10, 2019, President Trump claimed on Twitter that he had told Bolton on September 9 his "services are no longer needed" given "many" disagreements with Trump, thus Bolton gave his resignation on September 10. Just minutes later, Bolton contradicted Trump's account, tweeting out this claim: Bolton offered to resign on September 9, with Trump replying: "Let's talk about it tomorrow." Bolton later told the media Trump "never asked" for his resignation "directly or indirectly", and that he had both offered to resign and actually resigned of his own accord. Meanwhile, the White House endorsed Trump's version of the events. Politico reported that Tucker Carlson had urged Trump to fire Bolton.
After Bolton's departure, Trump claimed that Bolton's views were "not necessarily tougher" than his own: "in some cases, he thought it was too tough what we were doing". On Cuba and Venezuela, Trump claimed that his own views were "far stronger" than Bolton's: "He was holding me back!" Bolton himself was known for his hawkish positions, including on Cuba and Venezuela, while Trump previously in May 2019 offered a different view of Bolton: "I actually temper John, which is pretty amazing."
Following his departure, Bolton was reappointed as a senior advisor to investment company Rhône Group, a role he had held previously.
Since leaving the first Trump Administration, Bolton has been harshly critical of Donald Trump, with a 2023 edition of his memoirs criticizing Trump as a man who punishes "personal enemies and appease[s] adversaries Russia and China".