The Republican candidates for president were back on the debate stage Saturday night, and it didn’t take long for things to get heated between Donald Trump, Ted Cruz, John Kasich, Marco Rubio, Jeb Bush and Ben Carson.

Columnist and frequent FOX News guest Charles Krauthammer summed it up perfectly when he appeared on the network following the debate.

“If the previous Republican debates have been World War I or II this was thermonuclear,” Krauthammer said on FOX News, via Real Clear Politics. “I have never seen as much personal attacks or high temperature attacks as we saw in this debate. I am not even sure that you can judge the debate on who won or lost on the actual sound bites, who won this exchange or, that that, it was the tone. I think that if you counted up the number of times that the word ‘lie’ and ‘liar’ was employed, it would exceed the number of times it has been used in all previous debates.”

He added: “We went here from WWE to the UFC. This was a cage fight of the sort that I don’t think we have seen at a presidential level before.”

Hear Krauthammer’s comments for yourself in the video below.

Thumbnail photo via Heidi Heilbrunn/The Greenville News via USA TODAY NETWORK IMAGES

Thumbnail photo via Republican presidential hopeful Ted Cruz (left) debates against Donald Trump