Republican presidential candidate, businessman Donald Trump, speaks during a rally coinciding with Pearl Harbor Day at Patriots Point aboard the aircraft carrier USS Yorktown in Mt. Pleasant, S.C., Monday, Dec. 7, 2015. Mic Smith AP
">

Trump told MSNBC he’s asking for a “temporary” ban until the U.S. is able to “get our hands around this situation.” Host Willie Geist noted that religion doesn’t appear on passports, but Trump suggested customs agents would inquire about travelers’ religion.

“They would say are you Muslim?,” Trump said. And if they said, yes, they’d not be allowed in the country, he said.

Immigration experts told the Washington Post that Trump’s proposal is “ridiculous” and “unconstitutional.”

Anita Kumar contributed to this report.