Protestors chat under an umbrella with the British and EU flag as they meet to protest against Brexit opposite the House of Parliament in London, Tuesday, Nov. 27, 2018. Prime Minister Theresa May made a blunt appeal to skeptical lawmakers on Monday to back her divorce deal with the European Union: It isn't perfect, but it's all there is, and the alternative is a leap into the unknown. (AP Photo/Frank Augstein)
The European Union's highest court on Tuesday began considering whether Britain can unilaterally change its mind about leaving the EU, as British Prime Minister Theresa May struggled to contain criticism of her divorce deal from U.K. politicians and U.S. President Donald Trump.
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The European Court of Justice is assessing the issue under an accelerated procedure, since Britain is due to leave the bloc on March 29.
Since Article 50 of the EU treaty of Lisbon dealing with departing members is scant on details — largely because the idea of any country leaving the bloc was considered unlikely — a group of Scottish legislators wants to know whether the U.K. can pull out of the withdrawal procedure on its own.
The case comes as pressure builds from Brexit opponents for a second referendum on the decision to leave the bloc.
The court decision is not expected for several weeks and could be dragged out into the new year, close to Britain's departure date.
May is making a blunt appeal to voters and to lawmakers to support her divorce deal, arguing that any alternative would be a jump into the unknown. The Scottish lawmakers want to make clear there is an alternative.
"There is an industrial-scale spin operation from the U.K. government to say that this cannot be turned around, this must be gone through, said Alyn Smith, a Scottish National Party member of the European Parliament who is part of the proceedings.
"I do not believe that is the case."
May insists her Conservative government has no intention of reversing Britain's decision in June 2016 to leave. She is crisscrossing the U.K. on a Herculean quest to drum up support for the Brexit deal before Parliament decides its fate on Dec. 11.
On Tuesday she was holding meetings with business and political leaders in Wales and Northern Ireland — where her parliamentary allies in the Democratic Unionist Party have vowed to vote against the agreement.
DUP leader Arlene Foster claimed that "the prime minister has given up" on getting a good deal.
The Brexit withdrawal agreement, approved by the EU on Sunday, has been savaged by pro-Brexit and pro-EU British politicians as a messy compromise that leaves the U.K. half-in, half-out of the bloc.
May argues that it delivers on voters' decision to leave while protecting jobs and businesses through continued close ties with the EU — achieved by continuing to adhere to EU rules and standards in many areas.
May's sales campaign received a blow from President Donald Trump, who said the agreement seemed like a "great deal for the EU" that would make it more difficult for the U.K. to strike a trade deal with the U.S.
Trump said "right now, if you look at the deal, they may not be able to trade with us, and that wouldn't be a good thing."
May denied Trump's comments had put a dampener on one of the main arguments put forward for Brexit. She said under the Brexit agreement, "we will have an independent trade policy and we will be able to negotiate trade deals with countries around the rest of the world."
"As regards the United States, we have already been talking to them about the sort of agreement that we could have in the future," May said as she visited an agricultural fair in Wales. "We have a working group set up and that is working very well, has met several times and is continuing to work with the U.S. on this."
But her former defense secretary, Michael Fallon, until now an ally of May, said Trump's comment couldn't be ignored.
"He's the president of the United States, and if he says it's going to be difficult, then it certainly looks like it's going to be difficult," Fallon told the BBC.
He said May's deal "gives us the worst of all worlds — no guarantee of smooth trade in the future and no ability to reduce the tariffs that we need to conclude trade deals with the rest of the world."
May's de facto deputy prime minister, David Lidington, said Britain would be able to negotiate trade deals with countries including the U.S. — though he conceded "it's going to be a very tough negotiation."
"The United States is a tough negotiator, President Trump's always said very plainly 'I put America first,'" Lidington said.
After meeting students and businesspeople at Queen's University Belfast, May insisted support for her deal was greater than the political tempest suggested.
"The message I have clearly heard here today from across the board — from the voluntary sector, from young people, from businesses, from the cultural sector, from academics — is the importance of that certainty and the importance of Parliament accepting that deal so we can move on to develop our future," she said.
Lawless reported from London.
See the AP's Brexit coverage at: https://www.apnews.com/Brexit