Donald Trump is now the presumptive Republican presidential nominee. But that doesn’t change the fact that he is manifestly unfit to be president.

His unfitness has little to do with ideology. Trump doesn’t have anything consistent or coherent enough to be called an ideology. Trump has no business being commander in chief, but not because of any particular policy position—Trump’s foreign policy agenda, like his domestic agenda, blows with the wind. He was for the Iraq war before he was against it. He backed U.S. intervention in Libya in 2011 before he opposed it. He said the United States shouldn’t fight ISIS before he promised to “bomb the sh—” out of them and deploy ground troops to the Middle East.