"If they do a deal like that, we would be dealing with the European Union instead of dealing with the United Kingdom, so it will probably kill the deal", Trump told the local paper.
Some Conservative lawmakers have cast May's "business-friendly" Brexit plan as a betrayal that would leave Britain too close to the European Union and warned that she might face a leadership challenge.
Trump also addressed a controversial interview he had with The Sun soon after he arrived in the U.K. He told the tabloid May's soft Brexit plan could "kill" any possible trade deal between the U.K. and the U.S. But during the press conference, he said that's not the case.
"I think she is a very tough negotiator, she is a very, very smart and determined person", the president commented, adding he would rather have May as his friend than his enemy.
However, he suggested that May might opt to take his suggestion in the future, adding: "Maybe someday she will do that, if they don't make the right deal".
The recording exists. And it completely and utterly contradicts Trump's claim.
And the Daily Star reports on TV and radio host Richard Bacon, who is ill in hospital.
William, Kate’s third child Prince Louis christened
Prince Charles , Prince William's father, his wife Camilla , attended along with Prince Harry and his wife Meghan . Those names may not sound familiar to the public, but they are notable people in the royal family's lives.
He adds that Mr Boris Johnson, one of Mrs May's primary rivals within the Conservative Party, would "make a great prime minister". "She's a total professional, because when I saw her this morning I said, 'I want to apologize, because I said such good things about you"'.
He didn't elaborate. He said that May is "doing a terrific job".
Watched by the two leaders' teams, including Mr Trump's chief of staff, John Kelly, and national security adviser, John Bolton, and their opposite numbers, Gavin Barwell and Sir Mark Sedwill, the United States president and Theresa May began by reaffirming the value of the special relationship before embarking on a geopolitical tour that advertised division as much as unity.
Trump also said that he "would have done it much differently" in reference to the Brexit plan. "I actually told Theresa May how to do it but she didn't agree, she didn't listen to me", he said.
The president, however, did not back down from the controversial comments he made about immigration in the Sun interview, calling the influx of migrants a "very negative thing for Europe" during Friday's remarks.
"The relationship is further back than it was a few days ago", Dr. Jacob Parakilas, deputy head of the US and Americas program at London-based think-tank Chatham House, told Xinhua in an exclusive interview on Friday.
He later flew to Scotland where he will stay at his Trump Turnberry golf course until Sunday when he heads to Helsinki for talks with Putin, with whom Trump said he would bring up the issue of nuclear disarmament. I get along with her very nicely.