Asked on the BBC's Andrew Marr Show on Sunday what that suggestion was, May said: "He told me I should sue the EU".
Now, towards the end of President Trump's first official visit to the United Kingdom, he has returned to his golf resort in Scotland, ahead of his first ever meeting with Russian President Vladimir Putin.
"I said (to Theresa May), "Make sure you have a carve out, you have to have a carve out" where no matter what happens they have the right to make a deal with the United States", Trump said in the interview.
"The public will know they have been betrayed".More news: It Looks Like France …Belgium, England Battle For Third Place
"Some people are saying they want to vote in the Trade Bill to keep us in the customs union".
Matthew Butcher, an anti-Trump campaigner and one of the "babysitters" of the balloon, said: "I think that the thing that the Trump balloon does is that it brings an element of fun to the protests, but it also gets under Donald Trump's very thin skin".
The President is not the first person to advise such a gambit in the face of Brussels recalcitrance, however, with many Brexiteers suggesting the Prime Minister should have take the bloc to arbitration over its efforts to levy a massive divorce bill on the British without taking their share of European Union assets into account, and to shut them out of the Galileo satellite programme.
"My message to the country this weekend is simple: we need to keep our eyes on the prize", May wrote on Facebook.
The following day, at Chequers, Trump was photographed in the chair that belonged to the former wartime leader.More news: Ivanka Trump Products Dumped by Canada’s Largest Department Store Chain
Steve Baker, a senior lawmaker who served as a deputy to Davis in the Brexit ministry before resigning with his boss, said May had presided over a "cloak and dagger" plot to undermine Brexit.
Thousands of people are marching through the streets of Edinburgh to protest against President Donald Trump, who is staying in Scotland over the weekend.
"Now is the moment", The Telegraph quoted Bannon, Trump's former strategist and a key player in his 2016 election campaign, as saying. "But we should also prepare for no deal. This is an incredible opportunity for our two countries and we will seize it fully".
"I fully accept the Prime Minister is putting forward the Government White Paper as a well-intentioned attempt to do Brexit whilst minimising the economic disruption to Britain". Our companies will abide by these rules anyway, Giving them frictionless border means that the jobs that depend on that frictionless trade will be protected. "Parliament should reject this solution decisively". I wouldn't say advice.More news: France triumphs over Croatia in thrilling final goal-fest
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