At tonight's third presidential debate in Las Vegas, NV, Republican nominee Donald Trump refused to say that he would accept the results of the November's election. Journalists across the spectrum responded in horror:

Trump's answer on accepting the outcome of the vote is the most disgraceful statement by a presidential candidate in 160 years.

— Bret Stephens (@StephensWSJ) October 20, 2016

The worst thing in this debate was trump refusing to say he will concede if he loses.

— Kurt Eichenwald (@kurteichenwald) October 20, 2016

If a major party nominee refusing to promise to concede if he loses isn't the banner headline of this debate, I don't know what is.

— Marcus Wohlsen (@MarcusWohlsen) October 20, 2016

Cannot. Believe that a presidential candidate refuses to say whether he would concede the election if he loses. This is horrifying.

— Karen Attiah (@KarenAttiah) October 20, 2016

.@realDonaldTrump refuses to say he'll concede to @HillaryClinton. That is the least American thing ever. Drop out of the race #debate

— Valentina Zarya (@valzarya) October 20, 2016

Trump implies he won't concede to Clinton easily. That's pretty scary. #debatenight

— ESSENCE (@Essence) October 20, 2016

Nothing said this #debatenight will be as important as “I will look at it at the time.” That is a cavalier threat to the American project.

— Jamil Smith (@JamilSmith) October 20, 2016

1/ Trump's stunning refusal tonight to accept the outcome of the people's vote in the election is a rejection of U.S. democracy itself.

— Walt Mossberg (@waltmossberg) October 20, 2016

There is only one takeaway from tonight’s debate: Trump refuses to accept the outcome of the election, risking violence and democracy

— Andrew Flowers (@andrewflowers) October 20, 2016

this election is scary. but trump insinuating that he won't accept the outcome a lost election is pure terror of a different level.

— JamesMichael Nichols (@jamesmichael) October 20, 2016

Respecting the outcome of elections is THE very definition of a democracy. Trump's failure to do so is simply Un-American. #debatenight

— Jake Horowitz (@jacobdhorowitz) October 20, 2016

I haven't heard anything since Trump refused to commit to accepting the outcome of the election. Im just stunned… #debate

— Charles M. Blow (@CharlesMBlow) October 20, 2016

It's a dark and scary thing that Trump will keep us “in suspense” about whether he'll accept the outcome of the election.

— Jeffrey Young (@JeffYoung) October 20, 2016

Actually Scary: Trump refuses to commit to respecting election results. At last debate he said he would.

— Ken Bensinger (@kenbensinger) October 20, 2016

US media will lead on - and discuss for days - Trump refusal to say he'll accept outcome of election. He's threatened basis of US democracy

— Jonathan Freedland (@Freedland) October 20, 2016

I know why Chris Wallace wants to move to other subjects, but it would be worth lingering on the fact that Trump will undermine democracy.

— Jeffrey Goldberg (@JeffreyGoldberg) October 20, 2016

No question that headline of #debate is that Trump refuses to say he'd accept the will of voters. So much for respecting American democracy

— Indira Lakshmanan (@Indira_L) October 20, 2016

The biggest headline out of this debate is that Trump refuses to accept a fundamental premise of democracy.

— Adam Servianski (@AdamSerwer) October 20, 2016

Trump's refusal to say he will accept the results of the election is, in the true sense of an overused word, disqualifying.

— John Heilemann (@jheil) October 20, 2016