JOE SCARBOROUGH: A foreign-policy expert told me Trump asked 'why can't we use' nukes

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Joe Scarborough.

MSNBC host Joe Scarborough said Wednesday that a foreign-policy expert told him Donald Trump asked in a meeting three times "why can't we use" nuclear weapons.

"I'll be very careful here," he said on "Morning Joe." "Several months ago, a foreign policy expert, on the international level, went to advise Donald Trump, and three times he asked about the use of nuclear weapons."

"Three times he asked," he continued. "At one point, 'If we have them, why can't we use them?'"

Scarborough said that "this is on of the reasons why [Trump] doesn't have foreign policy experts around him."

"Be careful America, and be careful Republican leaders," co-host Mike Brzezinski chimed in.

Scarborough made the remarks after former director of the National Security Agency Michael Hayden said "no one" he knows from either side of the aisle is advising Trump on national security or foreign policy.

During a March interview with MSNBC's Chris Matthews, Trump said nuclear weapons "should be off the table," but asked "then why are we making them?" when the host insisted that nobody wants to hear an American presidential candidate talking about the use of nuclear weapons.

Watch Scarborough's and Hayden's remarks below: