Four summers ago, when the U.S . and Russia last held a summit of their two presidents, one of the officials in charge of organizing it was Eric Green. As Senior Director for Russia and Central Asia at the National Security Council, his phone rang whenever President Biden had a question about Vladimir Putin . In early 2021, it rang often.

For one thing, Putin decided that spring to send tens of thousands of troops to his border with Ukraine , raising fears of an imminent invasion.

At around the same time, Russian hackers launched a series of crippling ransomware attacks against American hospitals and businesses. On top of that, an important nuclear treaty between the U.S. and Russia was about to lapse. So Biden did what his successor, Donald Trump , would end up doing four ye

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