“The Russians have proved themselves to be quite adept at interfering and if [Putin] has a chance, he’ll do it again," Clinton told Jen Psaki.
It comes after four days of "unusually intense attacks" in both Ukraine and Russia.
A spat over grain has caused frustration on both sides this week.
But the Ukrainian leader warned his country is not prepared to hand over territory to Russia. “That is not the peace formula,” he said.
Antonio Guterres certainly opened the UN summit with a bang.
The Ukrainian president explained US funding is not only helping his country but also serves a much greater cause in curtailing Vladimir Putin's ambitions.
The former prime minister has accused the UK and the West of failing to give Volodymyr Zelenskyy enough support.
Russia and China's uproar over harmless radiation that their own nuclear plants regularly release is part of a disinformation campaign, the Japanese government told HuffPost.