After every good speech, the clock restarts and the Trump train is "back on track." Then, Mr. Trump acts like Mr. Trump again, and the clock gets reset to zero. Mr. Spicer's departure changed nothing. Firing Jeff Sessions will change nothing. Shakeups change nothing. Shake the White House snow globe all you like. The scene doesn't change much, and when things settle down, there Mr. Trump remains, being Mr. Trump. It won't change, because he can't change. Character is destiny, now and forever.