By Steve Holland and Matt Spetalnick

WASHINGTON (Reuters) – U.S. President Donald Trump abruptly fired his national security adviser John Bolton amid disagreements with his hard-line aide over how to handle foreign policy challenges such as North Korea, Iran, Afghanistan and Russia.

“I informed John Bolton last night that his services are no longer needed at the White House. I disagreed strongly with many of his suggestions, as did others in the Administration,” Trump tweeted on Tuesday, adding that he would name a replacement next week.

Bolton, a leading foreign policy hawk and Trump’s third national security adviser, was widely known to have pressed the president for a harder line on issues such as North Korea. Bolton, a chief architect of Trump’s strident stance against Iran, had also advocated a tougher approach on Russia and Afghanistan.

The 70-year-old Bolton, who took up the post in April 2018, replacing H.R. McMaster, had sometimes been at odds with Secretary of State Mike Pompeo, one of Trump’s main loyalists.

Offering a different version of events than Trump, Bolton tweeted: “I offered to resign last night and President Trump said, “Let’s talk about it tomorrow.”

Trump had sometimes joked about Bolton’s image as a warmonger, reportedly saying in one Oval Office meeting that “John has never seen a war he doesn’t like.”

A source familiar with Trump’s view said Bolton, an inveterate bureaucratic infighter with an abrasive personality, had ruffled a lot of feathers with other key players in the White House, particularly White House chief of staff Mick Mulvaney.

“He doesn’t play by the rules,” the source said. “He’s a kind of a rogue operator.”

During his time at the State Department under the administration of Republican former President George W. Bush, Bolton kept a defused hand grenade on his desk. His 2007 memoir is titled: “Surrender Is Not An Option.”

Trump’s North Korea envoy, Stephen Biegun, is among the names floated as possible successors.

“Biegun much more like Pompeo understands that the president is the president, that he makes the decisions,” said a source close to the White House.

Also considered in the running is Deputy Secretary of State John Sullivan, who had been expected to be named U.S. ambassador to Russia.

White House spokeswoman Stephanie Grisham said “many, many issues” led to Trump’s decision to ask for Bolton’s resignation. She would not elaborate.

“HE’LL BOMB YOU”

Trump would sometimes chide Bolton about his hawkish ways in meetings, introducing him to visiting foreign leaders by saying, “You all know the great John Bolton. He’ll bomb you. He’ll take out your whole country.”

Officials and a source close to Trump said the president had grown weary of his hawkish tendencies and the bureaucratic battles he got involved with.

Bolton traveled widely in the role and on his travels, for example, he warned Russia against interfering in U.S. elections and promoting strong ties with Israel.

Bolton, a former U.S. ambassador to the United Nations and Fox News television commentator, had opposed a recent State Department plan to sign an Afghan peace deal with the Taliban militia, believing the group’s leaders could not be trusted.

Sources familiar with his view said Bolton believed the United States could draw down to 8,600 troops in Afghanistan and maintain a counter-terrorism effort without signing a peace deal with the Taliban.

U.S. officials have said it was Bolton who was responsible for the collapse of a summit in February between Trump and North Korean leader Kim Jong Un in Hanoi by recommending the presentation a list of hard-line demands that Kim rejected.

North Korea media in May referred to Bolton as a “war maniac” who “fabricated various provocative policies such as designation of our country as ‘axis of evil’, preemptive strike and regime change.”

During an earlier period of U.S.-North Korea tensions in 2003, North Korea called Bolton “human scum.”

Bolton’s departure – the latest in a series from Trump’s national security team in recent months – comes a day after North Korea signaled a new willingness to resume stalled denuclearization talks with the United States, but then conducted the latest in a recent spate of missile launches.

U.S. oil prices fell more than 1 percent on the news of Bolton’s departure with investors believing it could lead to a softer U.S. policy on Iran.

Bolton had spearheaded Trump’s hard-line policy against Iran, including the U.S. abandonment of an international nuclear deal with Tehran and reimposition of U.S. sanctions.

Bolton was widely believed to have favored a planned U.S. airstrike on Iran earlier this year in retaliation for the downing of a U.S. surveillance drone, an action Trump called off at the last minute. Trump has since expressed a willingness to talk to Iranian leaders under the right conditions.

Bolton was an ardent opponent of arms control treaties with Russia. He was instrumental in Trump’s decision to withdraw last month from a 1987 accord that banned intermediate-range missiles because of what Washington charged was Moscow’s deployment of prohibited nuclear-capable cruise missiles, an allegation Russia denied.

(Additional reporting by Roberta Rampton, Arshad Mohammed, David Brunstromm, Jonathan Landay; Writing by Matt Spetalnick,; Editing by Mary Milliken and Alistair Bell)