Physicist Stephen Hawking slammed Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE on Monday and questioned how the presumptive GOP presidential nominee was so popular.

Hawking called Trump a "demagogue who seems to appeal to the lowest common denominator" during an interview on the United Kingdom's ITV morning show, according to The Associated Press.

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Hawking said he was baffled by how Trump had made it so far.

"I can't," Hawking said when asked to explain why Trump was so popular.

Last week, Trump secured the number of delegates necessary to clinch the Republican nomination.

Trump has been the only candidate left in the GOP race since rivals Ted Cruz Rafael (Ted) Edward CruzVideo of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Democrat on Graham video urging people to 'use my words against me': 'Done' MORE and John Kasich dropped out earlier this month.

During the interview, Hawking also said British voters should be in favor of keeping the U.K. in the European union, as it helps provide support for British scientific research, the economy and security.

"Gone are the days we could stand on our own against the world,” he said.

“We need to be part of a larger group of nations, both for our security and our trade."





