Where does this leave us? What might one deduce from the Helsinki summit? Either Trump is too thoroughly inept to continue as president, or his predatory nature, as demonstrated in his business — not to mention his boasting about aggression toward women — has led to his collecting rogues to enhance his own power. Or both. In any case, he has stepped over all lines of acceptable presidential behavior and presents a clear and present danger to the United States.

When our chief executive, whose principal job is to defend both the Constitution and the nation against aggressors, stands alongside our chief geopolitical foe and betrays two of our most important institutions in the service of his own ego, he has dimmed the lights in the shining city on a hill and left the world a far darker place.

It’s often said that America is great because America is good. My faith in the institutions and the individuals who conferred upon us a singular role in the history of humankind is yet unshaken. But a cancer lives among us, and the good people of this country must be precise in its excision. If Republicans don’t do it now, Democrats will probably sweep the ballots in November and do it then.