Obama flexing his muscle.
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The Obama administration on Sunday worked to isolate Russia on the world stage even as its president, Vladimir Putin, showed no signs of rolling back his military intervention in Ukraine.

President Obama spoke by phone with leaders from Great Britain, Germany and Poland, and he dispatched Secretary of State to Kiev on Tuesday for a show of solidarity with the new Ukrainian government.

After suspending preparations for an upcoming Group of 8 summit in Sochi, the administration began canceling lower-level diplomatic and economic meetings with Russian counterparts. And senior administration officials warned that Russia could be booted from the G8 altogether and that its economy would suffer because of Putin’s decision to occupy the Crimean peninsula following the ouster last week of Ukraine’s pro-Russia president, Viktor Yakunovych.