If Mr. Trump wins the nomination, the G.O.P. will become the party of anti-reason.
I will go further: Mr. Trump is precisely the kind of man our system of government was designed to avoid, the type of leader our founders feared — a demagogic figure who does not view himself as part of our constitutional system but rather as an alternative to it.
The job before democracy is to get rid of such canaille. If it fails, they will devour it.