U.S. senator on Russia's nuclear threats against Ukraine: That would be attack on NATO

U.S. Senator Lindsey Graham has responded to a statement by Dmitry Medvedev, deputy head of Russia's Security Council, in which he threatened to use nuclear weapons against Ukraine.

"To my Russian friends who talk about using nuclear weapons in Ukraine: You need to understand that would be an attack on NATO itself, given Ukraine's proximity to NATO territory," Graham wrote on Twitter.

He also added: "Time to sober up, realize that your barbaric invasion of Ukraine is not working, withdraw and save many young Russians from a pointless death."

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Medvedev stated on July 30 that Russia "would have to" use nuclear weapons if the Ukrainian offensive was successful and Ukrainian forces liberated the territories captured by Moscow.