I’m just stunned.

In a race that has been full of shocking moments, one at Wednesday’s presidential debate stands out as the most shocking: Donald Trump’s refusal to commit to accepting the outcome of the election.

And that’s saying something, because there were other shocking moments during the debate, like when Trump called Hillary Clinton a “nasty woman” or when he said he would deport “bad hombres” or suggested that late-term abortion included instances where doctors would “rip the baby out of the womb of the mother” and do so “as late as one or two or three or four days prior to birth.”

But nothing even came close to this exchange between the moderator, Chris Wallace, and Trump:

Wallace: Do you make the same commitment that you will absolutely — sir, that you will absolutely accept the result of this election? Trump: I will look at it at the time. I’m not looking at anything now, I’ll look at it at the time.

Trump went on in his response to complain about the media, saying: “They’ve poisoned the minds of the voters.” Then he complained about outdated voter registration rosters, then he pivoted to his belief that Clinton shouldn’t have been allowed to run. To him, all these things contributed to the election being “rigged.”

Wallace came back with a short history lesson:

But, sir, there is a tradition in this country — in fact, one of the prides of this country — is the peaceful transition of power and that no matter how hard-fought a campaign is, that at the end of the campaign that the loser concedes to the winner. Not saying that you’re necessarily going to be the loser or the winner, but that the loser concedes to the winner and that the country comes together in part for the good of the country. Are you saying you’re not prepared now to commit to that principle?

Trump’s response:

What I’m saying is that I will tell you at the time. I’ll keep you in suspense. O.K.?

Clinton called the remark “horrifying,” and she was right. This is jaw-dropping, unprecedented and thoroughly irresponsible. This is an attack on our democracy itself.