British Foreign Secretary Jeremy Hunt lashed back Tuesday at President Trump, calling his remarks about the UK’s US ambassador and Prime Minister Theresa May “disrespectful and wrong.”

“@realDonaldTrump friends speak frankly so I will: these comments are disrespectful and wrong to our Prime Minister and my country,” Hunt, who is vying to succeed May as prime minister, said on Twitter.

“Your diplomats give their private opinions to @SecPompeo and so do ours! You said the UK/US alliance was the greatest in history and I agree … but allies need to treat each other with respect as @theresa_may has always done with you.”

He added: “Ambassadors are appointed by the UK government and if I become PM our Ambassador stays.”

The president tweeted on Monday that his government will “no longer deal” with Sir Kim Darroch over messages leaked to Britain’s Daily Mail, in which the envoy called the Trump White House “inept” and “uniquely dysfunctional.”

Britain said it would apologize directly to Trump and his daughter and White House adviser Ivanka Trump over the leaked memos.

On Tuesday, Trump continued his attack on Darroch, describing him as “wacky” and a “pompous fool.”

“The wacky Ambassador that the U.K. foisted upon the United States is not someone we are thrilled with, a very stupid guy,” Trump said in a tweet.

“He should speak to his country, and Prime Minister May, about their failed Brexit negotiation, and not be upset with my criticism of how badly it was handled.

“I told @theresa_may how to do that deal, but she went her own foolish way-was unable to get it done. A disaster! I don’t know the Ambassador but have been told he is a pompous fool. Tell him the USA now has the best Economy & Military anywhere in the World, by far,” he said.

May’s Downing Street office has said that while the leak is unfortunate, “Kim Darroch continues to have the prime minister’s full support.”

Shortly after Hunt’s tweets, officials confirmed that a meeting between British Trade Secretary Liam Fox and Commerce Secretary Wilbur Ross had been canceled, according to Sky News.

Hunt and his rival Boris Johnson are competing to replace May as Conservative Party leader and prime minister.

Asked about Trump’s criticism of May, Johnson said, “Myself, I have said some pretty critical things about the Brexit negotiations so far” and “I think it’s very important that we have a strong relationship with our most important ally.”