A spokesperson for British Prime Minister Theresa May on Friday condemned President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE for praising Rep. Greg Gianforte Gregory Richard GianfortePence seeks to boost Daines in critical Montana Senate race On The Trail: How Nancy Pelosi could improbably become president Supreme Court denies push to add Green Party candidates to Montana ballot MORE (R-Mont.) for his 2017 assault of a reporter from the British newspaper The Guardian.

Trump, at a campaign rally in Montana on Thursday, joked that Gianforte's assault on Guardian reporter Ben Jacobs had helped him when his at-large House special election in May 2017.

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“Never wrestle him. Never. Any guy that can do a body slam, he’s my kind of … he’s my guy,” he said at a Montana campaign rally on Thursday as the crowd cheered.

“We endorsed Greg really early, but I heard that he had body slammed a reporter. And he was way up … and I said, ‘Oh, this is terrible, he’s going to lose the election.’ But then I said, ‘Well wait a minute, I know Montana pretty well, I think it might help him,’ and it did. … He’s a great guy and a tough cookie,” Trump added.

In response to those comments, May's spokesperson said they think violence against reporters is "completely unacceptable."

"He obviously made comments at a political rally and those are for him but more generally we would always say that violence or intimidation against a journalist is completely unacceptable,” a spokesperson for the prime minister said in a statement to the press on Friday.

Full, brief No 10 quote: “He [Trump] obviously made comments at a political rally, and those are for him. But more generally we would always say that any violence or intimidation against a journalist is completely unacceptable.” — Peter Walker (@peterwalker99) October 19, 2018

The Guardian also slammed the president for making light of the assault on Thursday night.

"The President of the United States tonight applauded the assault of an American journalist working for The Guardian," the newspaper's editor, John Mulholland, wrote in a statement obtained by The Washington Post.

Mulholland added such statements might only inflame future violence against journalists following the disappearance and suspected death of Jamal Khashoggi, the Washington Post columnist who was last seen entering the Saudi Consulate in Istanbul more than two weeks ago.

"We hope decent people will denounce these remarks and that the president will see fit to apologize for them," the editor added.

The assault occurred the night before Gianforte’s election after a significant number of votes had already been cast during early voting or via absentee ballots.

Gianforte was running for the congressional seat vacated when Interior Secretary Ryan Zinke Ryan Keith ZinkeTrump extends Florida offshore drilling pause, expands it to Georgia, South Carolina Conspicuous by their absence from the Republican Convention Trump flails as audience dwindles and ratings plummet MORE joined the Trump administration. He won the seat by 6 points.

The lawmaker pleaded guilty to a misdemeanor charge of assault and was sentenced to a 180-day deferred sentence, 40 hours of community service, 20 hours of anger management and a $300 fine along with a $85 court fee.

“I am sorry for what I did and the unwanted notoriety this has created for you. I take full responsibility," Gianforte previously said in an apology statement to Jacobs.