The comparisons of the Obama and Nixon White Houses are suddenly coming—pardon the expression—fast and furious, and why not? The IRS investigations; the administration’s fixation on leaks and leakers and its obsession with enemies; the cover-ups, the blame-shifting to subordinates, the defiant chief executive, even the sweating, pathetically dissembling press secretary; it all has the odor of that earlier time. Again, it’s all happening early in the second term, following a triumphant reelection. Again, the operative terms are arrogance, contempt for law, and thuggery. The growing awareness of administration malfeasance is evident in the numbers on Google: more than 59...