Now he’s gone and done it. This time Donald Trump has crossed the Rubicon of misconduct. He’s in so much trouble that only the Democrats can save him. Trump’s Mar-a-Lago dinner with two anti-Semites, Kanye West and Nick Fuentes, is indefensible and his claim of ignorance about Fuentes’ Holocaust denialism won’t fly in a world with Google. But almost as gag-worthy as Trump’s response is the ritualistic wave of predictions that the last act of his political career is imminent. Past prophecies to that end recall the “greatly exaggerated” reports of Mark Twain’s death, but that hasn’t stopped a fresh...