Donald Trump could cause chaos in the Tory leadership contest by backing Boris Johnson for the top job during his state visit, it has been feared.
In the past the 45th president has not been shy hiding his admiration of the tousle-haired former Foreign Secretary.
Mr Johnson is currently considered the front runner to replace Theresa May as leader of the Conservative Party.
In the past Mr Trump has been full of praise for the former Foreign Secretary and there are fears in the cabinet he could back him when he visits the UK between June 3 and June 5.
Mr Trump is scheduled to give a press conference alongside Theresa May and has a track record of making off-the-cuff remarks.
One Cabinet minister fears Donald Trump will throw a hand grenade into the Tory leadership race - by endorsing Boris Johnson on his state visit.
The US President could also deal Tories a blow amid political turmoil by endorsing Nigel Farage, the minister warned.
“You can imagine him saying 'I could do a deal with these guys’,” the Cabinet minister told the Mirror.
Trump described the former Mayor of London as a friend during his visit to the UK in July 2018.
The president also said Johnson would make a good prime minister, comments that irritated May at the time and for which he apologized.
He is also on the record backing Brexit Party leader Nigel Farage.
The day after Trump's shock win over Hillary Clinton, Mr Farage went to Trump Tower in New York to meet the president-elect, becoming the first British politician to do so.
The then-UKIP leader spoke at a Trump rally during the campaign. Trump dubbed himself “Mr Brexit.”
Speaking outside the White House ahead of a visit to Japan today the Republican president told reporters: "I feel badly for Theresa, I like her very much. She worked very hard, she’s very strong.
"She decided to do something that some people were surprised at, some people weren’t. It’s for the good of her country."
He added: "But I like her very much. In fact, I’ll be seeing her in two weeks."
One of Mrs May's last acts in office will be to take part in President Trump's state visit to the UK.
