Meanwhile, Trump’s grasp of foreign policy has come up repeatedly as a potential issue if he were elected president. On MSNBC on Tuesday, host Joe Scarborough made this troubling claim about Trump.

Joe Scarborough: “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, at one point, 'If we have them, why can't we use them?’”