The Caligulan malice with which Donald Trump administered Paul Ryan’s degradation is an object lesson in the price of abject capitulation to power. This episode should be studied as a clinical case of a particular Washington myopia — the ability of career politicians to convince themselves that they and their agendas are of supreme importance.

The pornographic politics of Trump’s presidential campaign, which was preceded by decades of ignorant bile (about Barack Obama’s birth certificate and much else), have not exhausted Trump’s eagerness to plumb new depths of destructiveness. Herewith the remarkably brief timeline of the breaking of Ryan to Trump’s saddle.

On May 3, Trump won the Indiana primary, ending competition for the Republican nomination. On May 5, Ryan said he still was not prepared to endorse Trump. That day Trump responded that he was not ready to endorse Ryan’s agenda. This was not news, considering that Trump has campaigned against every significant element of this agenda — entitlement reform, the rule of law, revival of Congress as a counter to the executive overreach that Barack Obama has practiced and that Trump promises to enlarge upon.