The foundations of Obama’s foreign policy have taken a serious beating over the weekend, with his desire to see a nuclear-free world perhaps one of the biggest casualties.

Privacy is important, but not for the reasons privacy activists usually cite.

President Putin is making his move in Ukraine’s Crimea, and once again the West is caught flat-footed.

It isn’t clear how long the uncertainty over Ukraine’s new course will last. But the challenges that the country is facing are more obvious. Here are a few of the major ones.

Will Crimea secede from Ukraine? It’s not likely, unless actors in both Kiev and Moscow behave so egregiously that they end up destroying the very balance that has allowed Ukraine to work so far.

Walter Russell Mead sees a major, zero-sum geopolitical contest unfolding between the United States and Russia over Ukraine and Syria. Washington, he argues, should abandon its policy of seeking better relations and push back against Russia. But on its own, pushing back isn’t enough. America has to strike the right balance.

The seismic shift in Ukraine was achieved by its people—not by outside forces, and not by its politicians.

With a revolution on, the chances that events in Ukraine could provoke a dangerous confrontation between Russia and the West may be increasing.

The elites in Washington and Wall Street seem not to care about their decadence and even take joy in revelations about it.

U.S. and NATO missile defense plans are about more than just guarding against rogue missile threats from Iran. They will shape the U.S.-Russia relationship and, more importantly, long-term relations between America and Europe.