Donald Trump has suggested Theresa May’s Brexit agreement could threaten a US-UK trade deal.
The US president told reporters the withdrawal agreement “sounds like a great deal for the EU” and meant the UK might not be able to trade with the US.
No 10 insisted the deal is “very clear” the UK would be able to sign trade deals with countries around the world.
Meanwhile, the PM will say her deal “delivers for every corner of the UK” in visits to Wales and Northern later.
Speaking to reporters outside the White House, Mr Trump said: “Right now if you look at the deal, [the UK] may not be able to trade with us. And that wouldn’t be a good thing. I don’t think they meant that.”
It would appear Mr Trump was suggesting the agreement could leave Britain unable to negotiate a free-trade agreement with the United States.
However, responding to Mr Trump’s comments, a Downing Street spokesman said the Brexit withdrawal agreement struck on Sunday would allow the UK to sign bilateral deals with countries including the US.
“We have already been laying the groundwork for an ambitious agreement with the US through our joint working groups, which have met five times so far,” the spokesman added.
The comments came after Mrs May fought off heavy criticism of her Brexit deal from MPs on all sides of the Commons on Monday – insisting the agreement “delivered for the British people” by regaining control of laws, money and borders.
MPs will vote on whether to accept the deal on 11 December.
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In other developments:
- Research published by the London School of Economics, King’s College and the Institute for Fiscal Studies suggests the PM’s Brexit deal could leave the economy as much as 5.5% smaller in 10 years time than it would be if the UK stayed in the EU
- Theresa May confirmed in an article in the Sun newspaper she is “ready” to debate her Brexit deal with Labour leader Jeremy Corbyn in a TV debate two days ahead of the Parliamentary vote
- Judges at the European Court of Justice are to examine whether the UK can call off the process of leaving the EU without permission from member states, following a challenge by a group of Scottish politicians
- International Trade Secretary Liam Fox is visiting Israel to boost economic ties ahead of Brexit
By BBC North America editor John Sopel
Theresa May took a kicking in the House of Commons and then her closest ally, in the shape of Donald Trump, puts on his size 12 hobnail boots and joins in.
When Donald Trump fired a broadside at Theresa May’s Brexit deal there was nothing accidental or off the cuff about it.
Senior members of his administration maintain close contacts with prominent eurosceptics in the Conservative party.
But when the president says the agreement could jeopardise trade with the UK, it’s hard to see what he means. During the transition period, business with the US would presumably carry on in exactly the same way as it does now.
Yet all the time that Britain is in some way yoked to EU rules then there are limits to what can be negotiated in terms of a free trade deal – all points that have been made by those who campaigned for a more decisive Brexit.
This intervention, coming post deal and pre-Commons vote, can only be interpreted in one way – the president is siding with the prime minister’s critics.
As part of her two-week bid to convince MPs and the British public to back her deal, Mrs May will tell politicians and employers in Wales that they will have more power after Brexit, with more than 150 areas of policy passing to devolved parliaments and assemblies.
She will also highlight the potential benefits to farmers of leaving the EU’s Common Agricultural Policy.
Later, she will tell representatives of the five main political parties in Northern Ireland her deal will allow employers to “trade freely across the border with Ireland and have unfettered access to the rest of the United Kingdom’s market”.
Northern Ireland has featured heavily in discussions about Brexit because both the UK and the EU want to avoid a physical border – with guard posts and checks – between Northern Ireland and the Republic of Ireland. The agreement includes a “backstop” that would mean Northern Ireland would still follow some EU rules on things such as food products if a trade deal is not agreed.
Northern Ireland’s Democratic Unionist Party, which props up Mrs May’s government, has accused the PM of breaking her promise that Northern Ireland would never be treated any differently from the rest of the UK – but the PM has said the backstop was an “insurance policy no-one wants to use”.
Labour, the Lib Dems, the SNP, the DUP and many Tory MPs have said they will vote against the Brexit deal.
Labour leader Jeremy Corbyn said the “botched deal” would “leave the UK worse off”.
The SNP’s Iain Blackford said the agreement was “full of ifs and buts” which would result in Scottish fishermen being “sold out” while the Lib Dem leader Sir Vince Cable and Green Party MP Caroline Lucas both called for another referendum.
The UK is due to leave the EU on 29 March 2019.