Donald Trump Challenges Sadiq Khan, London's New Mayor, To An IQ Test & It's Super-Embarrassing

Donald Trump's quick temper and unfiltered insults are already worrisome for what he would do to America's relationships with other countries as president — countries other presidents and diplomats fought long and hard to win over. In his latest foreign relations blunder, Trump challenged London's new mayor to take an IQ test. Sadiq Khan, London's first Muslim mayor, vocally opposes the presumptive Republican presidential nominee, leading Trump to lash out and insult his intelligence.

Not long after Khan took office earlier this month, he attacked the billionaire's plan to ban all Muslims from entering the U.S. in response to fears of ISIS terrorism. "Donald Trump’s ignorant view of Islam could make both our countries less safe," he said, continuing that Trump "risks alienating mainstream Muslims around the world and plays into the hands of the extremists."

Trump, who's much better at dealing out criticism than taking it himself, fired back in an interview with Piers Morgan on ITV's Good Morning Britain. "When he won, I wished him well," he said of Khan. "Now I don't care about him." He called Khan's comments "very nasty" and dared him to take an IQ test to prove that he couldn't possibly make an intelligent statement (Trump apparently thinks this makes sense).

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"He doesn’t know me, hasn’t met me, doesn’t know what I’m all about," Trump told Good Morning Britain. "I think they were very rude statements and, frankly, tell him I will remember those statements."

Of course, a spokesperson for Khan immediately responded, telling ITV:

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. 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.

Khan insists he isn't a Muslim spokesperson, but Trump's discriminatory policies would effectively prohibit him and his family from visiting the U.S., making it personal for him. The London mayor is publicly rooting for Hillary Clinton to become the next U.S. president, even promising to help her beat Trump. Beyond just wanting Trump to lose, Khan would also like to see a female president elected, saying last week that he would "love" to see Clinton win because he thinks she's a great role model for his two teenage daughters.