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 meeting had been scheduled on the sidelines of September's G-20 summit of world economic leaders, taking place in St Petersburg, Russia.
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, and prompted The White House to indicate it was "evaluating the utility" of the September meeting. Sen. John McCain, R-Ariz., last week called on the U.S. "to fundamentally rethink our relationship with Putin's Russia."