Former California Gov. Arnold Schwarzenegger (R) on Wednesday chided President TrumpDonald John TrumpDemocrats' CNN town halls exposed an extreme agenda Buttigieg says he doubts Sanders can win general election Post-Mueller, Trump has a good story to tell for 2020 MORE for his recent criticism of the late Sen. John McCainJohn Sidney McCainWhy did Mueller allow his investigation to continue for two years? If you don't think illegal immigrants are voting for president, think again 10 factors making Russia election interference the most enduring scandal of the Obama era MORE (R-Ariz.), calling Trump's remarks "unacceptable."

The actor suggested to The Atlantic that Trump should talk with first lady Melania TrumpMelania TrumpThe Hill's Morning Report - Will Joe Biden's unifying strategy work? Trump hosts annual White House Egg Roll with record 74,000 eggs Trump plugs border wall in exchange with young Easter egg roll attendee MORE before he takes to Twitter. The first lady launched "Be Best," a campaign that advocates for children's well-being and discourages online bullying.

"Why don’t you go and sit down with your wife for just a few minutes, Mr. President, and listen to the First Lady when she’s talking about stopping online bullying," Schwarzenegger said. "That is a really great message. Which way do we go? Your way, or her way."

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Schwarzenegger praised McCain as "an unbelievable person," and said the country would be "lucky if everyone in Washington followed McCain’s example.

"So an attack on him is absolutely unacceptable if he’s alive or dead—but even twice as unacceptable since he passed away a few months ago," he said.

Trump has in recent days gone after McCain, who died last August after a battle with brain cancer. The president has specifically targeted the Arizona Republican over his ties to a dossier of allegations about Trump's alleged ties to Russia, and the late senator's 2017 vote against the repeal of ObamaCare. 

Trump escalated his attacks on Wednesday when he lamented that he was not thanked for giving McCain "the kind of funeral that he wanted."

"We sent him on the way, but I wasn’t a fan of John McCain," Trump said. Trump was not invited to McCain's funeral.

Schwarzenegger, who left office in 2011, has been a regular critic of Trump and often laments the current state of the Republican Party.

A former bodybuilder, he took a more personal jab at the president on Wednesday, joking to The Atlantic that Trump "must be working out every day because he’s so unbelievably in shape."