George Clooney and Steve Wynn recently learned there really are some things you shouldn’t bring up at the dinner table.

During a glitzy dinner in Las Vegas two weeks ago, the actor, 52, and hotel magnate, 72, got into a tiff over politics, specifically, President Obama.

“He called the president an asshole … that is a fact … I said the President was my longtime friend and then he said ‘your friend is an asshole.’ … At that point I told Steve that HE was an asshole and I wasn’t going to sit at his table while he was being such a jackass,” Clooney told the Las Vegas Review Journal in an email sent via his publicist.

But according to the “Monuments Men” star, who claims he left immediately following the altercation, it wasn’t Wynn’s political beliefs that disgusted him so.

“It had nothing to do with politics and everything to do with character,” the actor added.

Wynn’s account of the incident, which occurred during a dinner at Botero restaurant in Wynn’s Encore hotel, varied from Clooney’s, especially in regards to the actor’s temperament at the time of the blow-up.

“Clooney’s fun to be with when he’s sober,” the Vegas fixture told the paper. “If you have a chance to drink with him, you want to get there early, and don’t stay late.”

Wynn, a noted Obama critic, also called into question just how close the actor and president really are.

“When he’s drinking, he considers himself a close personal buddy of the president,” he said.