Speaking with reporters alongside Taoiseach Leo Varadkar on Thursday, Trump said that he was in Scotland at the opening of his new golf club the day before the referendum, and that he'd stated his belief that Britain would vote to leave the European Union. "I mean she's got to do what she's got to do", he said at the White House as he welcomed Irish Prime Minister Leo Varadkar for an early St. Patrick's Day celebration.
"I will tell you, I'm surprised at how badly it's all gone from the standpoint of a negotiation", Trump said, sounding like he wasn't that surprised at all.
"I don't think another vote would be possible because it would be very unfair to the people that won", he added.
"I think it could have been negotiated in a different manner, frankly", Trump said.
"If they don't talk to us we're going to do something that's very severe economically", Trump said.
He said: "We're talking to them about trade".
"I lived in a country where if I'd tried to be myself at the time, it would have ended up breaking laws", he said, The Advocate reports.
Trump has previously been critical of May's Brexit deal, warning that it could "kill" a bilateral trade agreement between the United States and the UK.
Meanwhile, at the traditional St Patrick's Day shamrock ceremony at the White House, Mr Varadkar praised Mr Trump for the results of his efforts to "Make America Great Again". "I regret that Brexit's happening". "The potential is unlimited!" "There is every expectation in Washington that a U.S. -U.K. trade deal could be in place by the end of 2019 if Brexit goes forward this month and Britain successfully leaves the Customs Union". "I predicted it was going to happen".
The Irish PM said the most pressing issue facing his country was how to settle questions about the future of the border between Ireland, an European Union member, and Northern Ireland, which won't be.
MPs are set to vote on Thursday evening on whether to request a delay until at least June.
Brexit won't spoil the relationship, even given Trump's history of turning on leaders who cross him, said Marquette University historian Timothy G. McMahon, president of the American Conference for Irish Studies. "And I was standing out on Turnberry, and we had a press conference, and people were screaming".