Donald Trump says he might not have good relationship with David Cameron

US presidential candidate also challenges Sadiq Khan ‘to take an IQ test’ after the London mayor described him as ‘ignorant’

Donald Trump has said that he might not have a “very good relationship” with David Cameron after the prime minister described his proposal to ban Muslims from the US as “stupid”.

The US presidential hopeful also sniped at the new London mayor, Sadiq Khan, for comments he made after being elected and warned him: “I will remember those statements.” He challenged Khan to “take an IQ test” after the mayor called him “ignorant”.

The presumptive Republican nominee, who is likely to go against Hillary Clinton in a bid for the White House in November, was speaking to Piers Morgan on ITV’s Good Morning Britain.

— Piers Morgan (@piersmorgan)May 16, 2016

Incredibly strong comments from Trump re Cameron & Sadiq Khan's 'ignorant' jibes. Going to have real ramifications if he wins. @GMB

On being elected as London mayor, Khan said Trump was “ignorant” in his views on Islam and he risked harming security on both sides of the Atlantic.

Trump said in response: “When he won I wished him well and now, I don’t care about him. Let’s see how he does, let’s see if he’s a good mayor.

“He doesn’t know me, hasn’t met me, doesn’t know what I’m all about. I think they were very rude statements and frankly, tell him I will remember those statements. They are very nasty statements.”

Khan hit back at the comments after Trump’s interview was broadcast on Monday morning. “Donald Trump’s views are ignorant, divisive and dangerous – it’s the politics of fear at its worst and will be rejected at the ballot box just as it was in London,” his spokesperson said.

“Sadiq has spent his whole life fighting extremism, but Trump’s remarks make that fight much harder for us all – it plays straight into the extremists’ hands and makes both our countries less safe.”

He said the mayor would not accept Trump’s offer that the two should compare IQ scores. “Ignorance is not the same thing as lack of intelligence,” Khan’s representative said.

In the interview with Morgan, Trump also attacked the prime minister’s comments on his “Muslim ban”, which Cameron had called “divisive, stupid and wrong”.

Trump said: “Honestly, I don’t care, it doesn’t matter. It looks like we’re not going to have a very good relationship. I hope to have a good relationship with him, but it sounds like he’s not willing to address the problem either.

“Number one, I’m not stupid, I can tell you that right now, just the opposite. I don’t think I’m a divisive person, I’m a unifier, unlike our president now.”

The Republican was also likely to disappoint Cameron with his continued support for the campaign for Britain to leave the EU. “A lot of the migration and a lot of the acceptance of people is because of the European Union, I think that’s been a disaster,” he said.

“I think if I was from Britain I would want to go back to a different system. I’ve dealt with the European Union and it’s very bureaucratic. Personally, in terms of Britain I would say, what do you need it for?”

He rebuffed Barack Obama’s claim that the UK would be at the “back of the queue” when it came to making a new trade deal with the US. “You have to make your own deal,” he said. “Britain’s been a great ally. They’ve been such a great ally they’ve gone into things they shouldn’t have gone into, for example going into Iraq. With me, they’ll always be treated fantastically.

“I’m not going to say front of the queue but it wouldn’t make any difference to me whether they were in the EU or not. You would certainly not be back of the queue, that I can tell you.”

A No 10 source said: “We do not agree with his comments about Muslims. We think they are wrong and have distanced ourselves from them.” However, the source also said: “We would work with whoever the American people elect.”