The former national security advisor of Donald Trump has branded the former US President's administration unproductive "to say the least".
"Life inside the Trump administration was like trying to work inside a pinball machine and when you're trying to run a global foreign policy, it's very hard if the President isn't focused on a sustained basis," Bolton, who worked under multiple White House administrations, said in an interview with AM on Wednesday.
Serving under Trump from April 2018 to September 2019, Bolton left the role after Trump said he had sacked him.
Trump said he and others in the administration had disagreed strongly with many of Bolton's suggestions.
But Bolton, now 74, told AM he actually resigned before Trump announced his dismissal.
"What I should've done was made the resignation public before he acted - I was being polite which, with Trump, is always a mistake. The things he said about me lead immediately to the question, 'Who hired that guy, Bolton?'"
Bolton said he wouldn't support Trump if he became the 2024 Republican presidential nominee.
"Speaking as a Republican now, I hope we don't have to face that problem again next year," he said.
"I hope somebody else more responsible gets our nomination."
Trump's aides filed paperwork for his 2024 White House bid in November, seeking a potential rematch with Democrat Joe Biden.
Asked what he thought of rumours he was running for President himself, Bolton replied: "Well, I am thinking about it but I would even exclude myself from that calculus if we have good people running.
"I hope they can prevail. I certainly hope it's not Donald Trump again," he said.
