Donald Trump is many things. Most of all, he is the quintessential American entrepreneur. He sees the upside in everything. Even at the age of 78, he still has the energy to undertake every opportunity to advance himself and his interests.

When, for instance, he noticed a few weeks ago that Kamala Harris had claimed somewhat dubiously to have worked in McDonald’s, he didn’t just gripe that the media accepted her assertion without checking for evidence (though he did do that).