There’s nothing worse ― or less presidential ― than a sore loser.

However, during Wednesday’s presidential debate, republican nominee Donald Trump refused to commit to respecting the outcome of the 2016 presidential election.

“I will look at it at the time,” Trump told moderator Chris Wallace when asked whether he would accept the results. “What I have seen is so bad. First of all, the media is so dishonest and so corrupt, and the pile-on is so amazing.”

When pressed, Trump responded, “I’ll keep you in suspense.”

His answer horrified many Americans, including Sen. Tim Kaine (D-Va.), the running mate of Democratic nominee Hillary Clinton.

Donald won't commit to support our election outcome, won’t condemn Putin, and won't defend American democracy. Yet he wants to be president. — Senator Tim Kaine (@timkaine) October 20, 2016

Many others reacted on Twitter, saying Trump’s response reflected a lack of respect for democracy and everything America is built upon.

Sen. Lindsey Graham (R-S.C.) said Trump “is doing the party and country a great disservice by continuing to suggest the outcome of this election is out of his hands and ‘rigged’ against him.”

“If he loses,” Graham wrote, “it will not be because the system is ‘rigged’ but because he failed as a candidate.”

Trump has made many recent claims about the potential for a “rigged” election. Despite no evidence to support his claims, he continues to accuse the media of colluding against him.

Trump’s running mate Mike Pence, however, seemed to be on a different page. “I’ve said before that we’ll certainly accept the outcome of this election,” he said on CNN earlier on Wednesday. The RNC also claimed on Wednesday that Trump would accept the results of the Nov. 8 election.

Below, read some of the reactions from Americans as they watched the debate in disbelief and disappointment.

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

His answer inflicts serious damage to his campaign because in the end the American people want to know if you can be a good loser. https://t.co/Jd0sxtItCv — Michael Steele (@MichaelSteele) October 20, 2016

He should have said he would accept the results of the election. There is no other option unless we're in a recount again. — Laura Ingraham (@IngrahamAngle) October 20, 2016

My thoughts on a 'rigged' presidential election. pic.twitter.com/075n83NXMH — Lindsey Graham (@LindseyGrahamSC) October 20, 2016

That was horrifying. Based on that answer alone, I hope Mr Trump loses all 50 states. He deserves to. He is attacking democracy itself. https://t.co/t3vEPYZRJ3 — Michael R. Strain (@MichaelRStrain) October 20, 2016

.@oreillyfactor: "@realDonaldTrump made a tactical mistake by continuing to suggest the election may be rigged." #OReillyFactor pic.twitter.com/IuSvj3gYvg — Fox News (@FoxNews) October 21, 2016

Just step back and appreciate the madness of this - a nominee for US President saying he won't respect the outcome of the election. Unreal. — Chris Murphy (@ChrisMurphyCT) October 20, 2016

How can any Republican support a candidate who will not support a peaceful transition of power? — Brian Schatz (@brianschatz) October 20, 2016

.@realDonaldTrump saying that he might not accept election results is beyond the pale — Jeff Flake (@JeffFlake) October 20, 2016

The coin of the realm in a democracy is the peaceful transition of power. Voters get this. That's why this debate is a disaster for Trump. — Chris Murphy (@ChrisMurphyCT) October 20, 2016

Editor’s note: Donald Trump regularly incites political violence and is a serial liar, rampant xenophobe, racist, misogynist and birther who has repeatedly pledged to ban all Muslims — 1.6 billion members of an entire religion — from entering the U.S.