London's New Muslim Mayor Fears Donald Trump Would Keep Him Out of US

— -- London Mayor-elect Sadiq Khan said he fears he would be unable to visit the United States because he is Muslim if Donald Trump were elected president.

"If Donald Trump becomes the president, I’ll be stopped from going there by virtue of my faith, which means I can’t engage with American mayors and swap ideas,” Khan, 45, told Time magazine in an article published this morning.

Trump, the presumptive Republican presidential nominee, first proposed a temporary ban on Muslims entering the United States in December after the Paris terrorist attacks and San Bernardino, California, mass shooting.

But in a subsequent interview with the New York Times, Trump said London's new mayor could be an exception to his plan to temporarily halt Muslim's from entering the United States if he were elected president.

Trump told The Times he was "happy" that London had elected its first Muslim mayor and suggested Khan would be among the exception to his proposal.

"I was happy to see that," Trump said of Khan’s election. "I think it's a very good thing, and I hope he does a very good job because frankly that would be very, very good."

When asked about how his proposed ban would affect Khan, the business mogul said "there will always be exceptions."

Trump’s campaign did not respond Monday to ABC News' request for comment on whether Muslim mayors of foreign cities would be among the exceptions.

Either way, Khan told Time magazine he would visit America before January “in case Donald Trump wins.”

Khan was declared the new mayor of London Saturday, defeating conservative opponent Zac Goldsmith.

ABC News’ Candace Smith contributed reporting.