Biden on Putin: "For God's sake, this man can't stay in power."

US President Joe Biden said Saturday that his Russian counterpart Vladimir Putin "cannot stay in power", in a speech in the Polish capital Warsaw in which he addressed the conflict in Ukraine, describing it as a "strategic failure" for Russia.

He described Ukraine's resistance in the face of Russian forces as part of a "great battle for freedom", calling on the world to prepare for a long battle, and telling the Ukrainians: "We are on your side."

Biden added: "The Russian people are not our enemy," calling on him to hold his president responsible for the country's exposure to severe Western economic sanctions.

"Do not even think of advancing an inch into NATO territory," he warned Moscow, stressing that the United States considers Article 5 of the NATO Treaty on Mutual Defense a "sacred duty."

"For God's sake, this man cannot remain in power," he added, referring to his Russian counterpart.

He concluded his speech by saying: "We will have a different future, a brighter future rooted in democracy, principle, hope and light."

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