President Barack Obama has canceled a planned meeting in Moscow with Russia's President Vladimir Putin - a diplomatic snub that follows tensions over NSA leaker Edward Snowden.
The mini-summit had been scheduled for early September, days before the G-20 meeting of world economic leaders in St. Petersburg, Russia.
Obama still plans to attend the main G-20 summit.
Authorities in Moscow last week granted temporary asylum to Snowden, who is wanted by U.S. authorities for leaking classified intelligence information to newspapers.
That decision infuriated Washington. Sen. John McCain, R-Ariz., called on the U.S. "to fundamentally rethink our relationship with Putin's Russia."