Sen. Lindsey Graham may have said Russian President Vladimir Putin should be assassinated to end the war in Ukraine, but getting through his defenses makes the threat more easily called than answered.

The special bodyguard unit within Russia’s Federal Security Service that oversees Putin’s personal safety has strict requirements and special training, according to Kremlin-funded Russia Beyond. They are selected for their “operational psychology,” meaning they can predict and assess threats, with the No. 1 goal of protecting the president.