South Carolina Sen. Lindsey Graham sent a stunning message to the people of Russia, calling for someone in the country to rise up and assassinate Russian President Vladimir Putin to put an end to Moscow’s war against Ukraine.

“Is there a Brutus in Russia? Is there a more successful Colonel Stauffenberg in the Russian military?” Graham, a Republican, tweeted Thursday evening, referring to historical figures who betrayed and killed or sought to kill their leaders.

Graham also made an appearance on Fox News to deliver a similar plea to the Russian people.

A number of Graham’s Republican colleagues, including Reps. Matt Gaetz of Florida and Marjorie Taylor Greene of Georgia, were quick to rebuke the senator’s call for Putin’s demise.

Rep. Ilhan Omar, a Minnesota Democrat, offered a more succinct reproach.