Forget the relative normalcy of the first half of the final presidential debate on Wednesday. Disregard the fact that a low-energy Donald Trump managed to tone down his odiousness, keeping mostly to smirks and snide remarks and even a talking point or two. The key moment came near the end, when moderator Chris Wallace asked Trump about his most galling pronouncement in this election—that he isn’t committed to accepting its outcome because it’s “rigged.”

Wallace tried reasoning with Trump. He noted that Trump’s running mate, Indiana Governor Mike Pence, pledged to accept the will of the voters, as have members of Trump’s campaign. Wallace explained how America has a proud tradition of peaceful transitions of power between governments, with the loser conceding to the winner, and asked Trump, incredulously, whether he would really break from that norm. “Are you saying you’re not prepared now to commit to that principle?” he asked.

The Republican nominee, who has spent this entire campaign disregarding American’s best principles, remained noncommittal.

“I will tell you at the time,” he said. “I’ll keep you in suspense.”

TRUMP on whether he'll accept the results of the election: "I'LL KEEP YOU IN SUSPENSE." pic.twitter.com/ESPn2yy541 — Bradd Jaffy (@BraddJaffy) October 20, 2016

As he has in recent days, Trump also raised the specter of voter fraud—“millions of people that are registered to vote that shouldn’t be”—even though it’s never been a widespread problem. He whined about media bias, ignoring the absurdity of believing the press can rig an election. And in the end, he simply couldn’t bring himself to pledge to accept the people’s verdict on November 8.