Getty Images, Gavriil Grigorov, Sputnik, Kremlin Pool Photo via AP
- Former UK PM Boris Johnson criticized Tucker Carlson for his two-hour interview with Vladimir Putin.
- Johnson said Carlson failed to challenge Putin and question him about killing civilians in Ukraine.
- Using British slang for buttocks, he called the interview "bum-sucking servility to a tyrant."
Former UK Prime Minister Boris Johnson has called out Tucker Carlson after he went to Moscow to interview Russian President Vladimir Putin.