NINE WORDS THAT SHOOK THE WORLD: WHAT WAS JOE BIDEN THINKING?

President Biden delivers a speech at the Royal Castle on March 26, in Warsaw, Poland. Omar Marques/Getty Images

Ever since Joe Biden ended his speech in Poland on Saturday night by making one of the most dangerous statements ever uttered by a U.S. president in the nuclear age, efforts to clean up after him have been profuse. Administration officials scurried to assert that Biden didn't mean what he said. Yet no amount of trying to "walk back" his unhinged comment at the end of his speech in front of Warsaw's Royal Castle can change the fact that Biden had called for regime change in Russia.

They were nine words about Russian President Vladimir Putin that shook the world: "For God's sake, this man cannot remain in power."