In an extraordinary intervention timed to coincide with his UK visit, Mr Trump said Theresa May ignored his advice by opting for a soft Brexit strategy.
And he warned her any attempts to maintain close ties with the EU would make a lucrative US trade deal very unlikely.
Mr Trump said: “If they do a deal like that, we would be dealing with the European Union instead of dealing with the UK, so it will probably kill the deal.”
His comments, damaging to the Prime Minister, come as he delivers his most brutally honest verdict yet on Britain in which he also:
- Accused EU leaders of destroying its culture and identity by allowing in millions of migrants
- Tore into London Mayor Sadiq Khan for not standing up to terrorists
- Blamed Khan for spiralling crime in the capital
- Insisted former Foreign Secretary Boris Johnson would make “a great Prime Minister”
- Denied once branding Theresa May a “bossy schoolteacher”
- Maintained he would keep ties with Russian tyrant Vladimir Putin despite the Salisbury Novichok poisonings
- Demanded Britain and other Nato countries spend more on defence
- Spoke of his sadness at feeling unwelcome in the capital by anti-Trump protesters
- Claimed millions of Brits backed his policies
- Told of his pride at taking wife Melania to meet the Queen
Mr Trump’s remarks come as he prepares to meet the PM for a working lunch at Chequers.
He will then board a helicopter for Windsor Castle to meet the Queen before flying up to Scotland for a private two-day visit.
Thousands of people are expected to take part in a series of protests during his stay in the UK.
I told May how to do Brexit but she didn’t listen to me
THERESA May’s new soft Brexit blueprint would “kill” any future trade deal with the United States, Donald Trump warns today.
Mounting an extraordinary attack on the PM’s exit negotiation, the President also reveals she has ignored his advice on how to toughen up the troubled talks.
Instead he believes Mrs May has gone “the opposite way”, and he thinks the results have been “very unfortunate”.
His fiercest criticism came over the centrepiece of the PM’s new Brexit plan — which was unveiled in full yesterday.
It would stick to a common rulebook with Brussels on goods and agricultural produce in a bid to keep customs borders open with the EU.
But Mr Trump told The Sun: “If they do a deal like that, we would be dealing with the European Union instead of dealing with the UK, so it will probably kill the deal.
Uncomfortable press conference following Trump’s interview with The Sun: