text: 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.
  Trump–Ukraine scandal
  Following Bolton's departure, Fiona Hill, who served as the National Security Council's senior director for Europe and Russia, testified before a Congressional committee that Bolton had disassociated himself from what he viewed as the Trump administration's effort to pressure Ukraine into investigating the President's political rivals.