From the beginning of the Obama administration, we knew we wanted to reboot our relationship with Moscow. I coordinated Russia policy from the National Security Council, and Russia was one of the only other global powers, a crucial partner in world affairs. But the partnership had been badly strained by Vladimir Putin’s move toward greater autocracy, NATO expansion, the revolutions in Georgia and Ukraine, the war in Iraq, and Russia’s intervention in Georgia in 2008. President Barack Obama called this period a “dangerous drift.”

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