THE special relationship between the US and UK looked in jeopardy last night as the row over Donald Trump’s anti-Muslim Twitter posts intensified.

MPs launched an unprecedented attack on the American president in Parliament for sharing videos from far-right group Britain First. It came after Mr Trump refused to apologise and attacked Theresa May for saying he was wrong to share the clips.

He tweeted: ‘@Theresa_May, don’t focus on me, focus on the destructive radical Islamic terrorism that is taking place within the United Kingdom. We are doing just fine!’

Britain’s ambassador to the US has complained to the White House after Mr Trump shared the clips, including one that falsely claimed to show a Muslim migrant beating a youth on crutches.

Outraged MPs from across the political spectrum queued up to criticise the president as they quizzed home secretary Amber Rudd in the Commons.

Tory Peter Bone said he should delete his Twitter account to ‘make the world a better place’.

And Labour’s Paul Flynn said he should be ‘arrested for inciting racial hatred’ if he enters Britain.

He added: ‘Mr Trump has disgraced himself again and again, and he worries us because his impulsive finger is on the nuclear button.’

Mrs May repeated her comment that Mr Trump was wrong to share the videos as she gave a speech during a visit to Jordan.

She said: ‘The fact that we work together does not mean that we’re afraid to say when we think the United States has got it wrong, and be very clear with them.

‘And I’m very clear that retweeting from Britain First was the wrong thing to do.’

Ms Rudd told the Commons she hoped Mrs May’s criticism ‘would have some impact on the president’ but said his planned state visit to Britain would still go ahead. ‘An invitation for the visit has been extended and accepted but the dates and the precise arrangements have yet to be agreed,’ she said.

London mayor Sadiq Khan renewed his call for the state visit to be cancelled and said Mr Trump had helped to promote the ‘vile’ beliefs of Britain First.

Meanwhile, claims emerged that the president’s Twitter outbursts were a sign of failing mental health.

TV host Joe Scarborough, a former Republican congressman, said the billionaire’s advisers fear he may have a brain disease and is becoming ‘detached from reality’.

He said: ‘People close to him say he is mentally unfit… people close to him during the campaign told me he had early stages of dementia.’

Tony Schwartz, the co-author of Mr Trump’s book The Art of the Deal, said the president was ‘deeply mentally ill’ and his aides were ‘absolutely terrified’.

He added: ‘Two different people from the White House have called somebody I know to say “we are deeply concerned about him”.’