"I stand by everything I said during the campaign," Rubio told the Weekly Standard, when asked about a statement he made in February, before he dropped out of the presidential race, that he didn't want to turn over the U.S. nuclear codes "to an erratic individual."
Rubio has doubled down on that claim before, telling reporters in May that his "policy differences and reservations about Donald’s campaign are well-established." Rubio said he would vote for Trump because he signed a pledge to support the Republican presidential nominee.
Others also have expressed misgivings about trusting Trump with the U.S. nuclear arsenal. Sen. Dan Coats (R-Ind.) in March called a question about Trump potentially having the nuclear codes "tough." President Barack Obama and presumptive Democratic presidential nominee Hillary Clinton both have said the American people wouldn't trust Trump with the codes.