Already, Clinton has claimed international affairs as a key battleground against Trump, devoting her first major address of the general-election campaign to the topic. And she’s done so for understandable reasons. Foreign affairs is arguably the realm in which she can draw the sharpest contrast with Trump in terms of qualifications. In her national-security speech last week, Clinton noted that she visited 112 countries as secretary of state. Foreign affairs is also where the stakes of the election seem highest; in her speech, Clinton conjured images of a volatile Trump in the Situation Room, blustering through matters of war and...
