US Speaker Mike Johnson has suggested Volodymyr Zelenskyy might need to leave office in order for Ukraine to achieve a peace deal with Russia, as Lord Mandelson says Kyiv should commit to a ceasefire before Russia.

“Something has to change,” Mr Johnson told NBC.

“Either he needs to come to his senses and come back to the table in gratitude or someone else needs to lead the country to do that,” he added, referring to Mr Zelenskyy.

The Republican said “it’s up to the Ukrainians to figure that out”.

Meanwhile Lord Mandelson, the UK’s ambassador to the US, told ABC News: “I think that Ukraine should be the first to commit to a ceasefire and defy the Russians to follow.

“And then, as part of the unfolding plan for this negotiation, the Europeans and perhaps some other countries too have got to consider how they are going to put forces on the ground to play their part in providing enduring security and deterrence for Ukraine.”

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The remarks came two days after a disastrous meeting between the Ukrainian president and Donald Trump and his vice president JD Vance descended into a shouting match in the Oval Office.

Mr Johnson said: “What President Zelenskyy did in the White House was effectively signal to us that he’s not ready for that yet and I think that’s a great disappointment.”

The fallout left a proposed agreement between Ukraine and the US to jointly develop Ukraine’s natural resources in limbo.

The idea of Mr Zelenskyy stepping aside also came up on Friday after the Oval Office meeting, with US Republican senator Lindsey Graham saying the Ukrainian leader “either needs to resign or send somebody over that we can do business with, or he needs to change”.

Meanwhile, White House national security adviser Mike Waltz said it is not clear Mr Zelenskyy is prepared to secure lasting peace with Russia.

“We need a leader that can deal with us, eventually deal with the Russians and end this war,” Mr Waltz told CNN when asked whether Mr Trump wants Mr Zelenskyy to resign.

“If it becomes apparent that President Zelenskyy’s either personal motivations or political motivations are divergent from ending the fighting in his country, then I think we have a real issue on our hands.”

US secretary of state Marco Rubio said he had not spoken to Mr Zelenskyy since the spat on Friday.

“We’ll be ready to re-engage when they’re ready to make peace,” Mr Rubio told ABC.

But Democratic senator Amy Klobuchar told ABC she was “appalled” by the clash in the Oval Office and said she met Mr Zelenskyy before he went to the White House on Friday and he had been excited to sign an expected minerals deal.

“There is still an opening here” for a peace deal, she said.

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It comes as Sir Keir Starmer hosted a summit between Mr Zelenskyy and other European leaders in an effort to get a peace plan back on track.

The prime minister said the UK, France and Ukraine would work on a ceasefire plan to present to the US.

Sir Keir, who visited Washington on Thursday, said he believes Mr Trump does want a “lasting peace” but warned Europe is in a “moment of real fragility” and he would not trust the word of Vladimir Putin.

Mr Zelenskyy will later meet the King.