If you look beyond Donald Trump’s comprehensive unpleasantness — is there a disagreeable human trait he does not have? — you might see this: He is a fundamentally sad figure. His compulsive boasting is evidence of insecurity. His unassuageable neediness suggests an aching hunger for others’ approval to ratify his self-admiration. His incessant announcements of his self-esteem indicate that he is not self-persuaded. Now, panting with a puppy’s insatiable eagerness to be petted, Trump has reveled in the approval of Vladimir Putin, murderer and war criminal…

Until now, Trump’s ever-more-exotic effusions have had an almost numbing effect. Almost. But by his embrace of Putin, and by postulating a slanderous moral equivalence — Putin kills journalists, the United States kills terrorists, what’s the big deal, or the difference? — Trump has forced conservatives to recognize their immediate priority.

Certainly conservatives consider it crucial to deny the Democratic Party a third consecutive term controlling the executive branch. Extending from eight to 12 years its use of unbridled executive power would further emancipate the administrative state from control by either a withering legislative branch or a supine judiciary. But first things first. Conservatives’ highest priority now must be to prevent Trump from winning the Republican nomination in this, the GOP’s third epochal intraparty struggle in 104 years…

One hundred and four years of history is in the balance. If Trump is the Republican nominee in 2016, there might not be a conservative party in 2020 either.