WITH THE FINAL NOMINEES SETTLED AND three months of campaigning ahead, this American election season is likely to be one of the most tumultuous in recent memory. That’s okay; political contests, especially south of the border, have ever been tumultuous affairs. Yet there has never been anything like the showdown that has been building for months, largely because of Donald Trump. It almost seems like nothing new can be written about him. Appearing not to care what people say of him, the Republican candidate speaks with a directness that isn’t so much targeted as scattered about in every direction. This results in his dominating every news cycle, breaking every political protocol, and promoting a political war that seems to break every bond of respectability.…