The test of any summit between a U.S. President and an adversarial head of state is what the adversary concludes about the American. The three hours of talks Wednesday between President Biden and Russia’s Vladimir Putin seem to have involved a frank and polite discussion of strategic differences between the two nations. Now we’ll find out if Moscow sees more opportunities to push and probe, or whether the U.S. delegation showed commitment and resolve that deters further Russian revisionism.

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