One of the 10 or 15,000 Donald Trump subdramas heading into the fall is the question of whether the Republican presidential nominee will participate in all three scheduled debates. It's usually taken for granted that major-party candidates will agree to the Commission on Presidential Debates' schedule, but there’s no law requiring it, and Trump has never seen a political norm he hasn't considered razing and building something gaudy over. And over the past couple of weeks, he’s laid the groundwork for not participating in the debates by suggesting that they are, in some nebulous way, a trap he can't agree...