For Trump, then, the task of the debate was threefold: to hammer the point that Kamala Harris is responsible for the failed policies of the Biden-Harris White House, and that he is the agent of change — a proposition with which the majority of Americans tend to agree; to drive home that Harris is actually dangerously far-left, and that she is lying about her current policy positions in order to protect them from scrutiny; and that she is incompetent, having blown every single task she has ever been handed. In short, Harris is a cipher; it is Trump's job to...