Right-leaning radio host and former GOP Rep. Joe Walsh (Ill.) warned Republicans on Friday that President TrumpDonald John TrumpMarine unit in Florida reportedly pushing to hold annual ball at Trump property Giuliani clashes with CNN's Cuomo, calls him a 'sellout' and the 'enemy' Giuliani says 'of course' he asked Ukraine to look into Biden seconds after denying it MORE's remarks Thursday about Montana Rep. Joe Walsh (R) prohibit the right from complaining about violence from left-wing groups.

Walsh tweeted Friday morning that Trump "encourages & applauds physical violence" after the president appeared to praise Rep. Greg GianforteGregory Richard GianforteHere are the lawmakers who aren't seeking reelection in 2020 House Democrats targeting six more Trump districts for 2020 House GOP fears retirement wave will lead to tsunami MORE's (R) body-slam of a reporter during the 2017 Montana special election at his campaign rally Thursday night.

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"The President encourages & applauds physical violence against a journalist," Walsh tweeted.

"Hey Republicans, don't ever complain again about violence coming from the Left," he added.

Walsh is a former one-term congressman who now broadcasts daily on Salem radio and is frequently critical of the president.

He made similar comments Thursday night on Twitter immediately following the president's rally, during which he joked that Gianforte's assault of Guardian reporter Ben Jacobs probably "help[ed]" the Montana Republican win his election.

"Trump encourages & applauds physical violence against journalists. Trump's supporters? 'Hilarious, awesome, I love my President!' Maxine WatersMaxine Moore WatersBipartisan housing finance reform on the road less taken Manufacturing group leads coalition to urge Congress to reauthorize Ex-Im Bank Democrats' impeachment message leads to plenty of head-scratching MORE encourages & applauds confrontation against Republicans. Trump's supporters? 'Horrible, dangerous, the Left is a mob!' [Shaking my head]," Walsh tweeted Thursday night.

The president's comments Thursday were roundly criticized by journalists on social media, and on Friday they drew the ire of British Prime Minister Theresa May due to The Guardian's status as a British-based newspaper.

"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 on Friday.