Countering “dangerous movements at home might be the most productive thing we can do to maintain a convincing voice abroad,” one reader argues.

Ask people why they're camped out in Kiev's streets, and you'll get a multitude of answers. Will that doom the protest movement? 

“If the president can simply refuse all oversight, particularly in the context of an impeachment proceeding, the balance of power between our two branches of government will be irrevocably altered.”

Smaller-scale tactical nuclear weapons could bring the great powers into a brutal, deadly, and unprecedented conflict.

Putin’s order to raise Russia’s nuclear-alert status is aimed as much at a domestic audience as it is at the West.

After losing public confidence with the Afghanistan debacle, the president now has the opportunity to reset.

Germany has long argued that importing natural gas from Russia would help keep peace. That strategy is being tested now.

This is terra incognita for economic policy. No country has ever faced this kind of global freeze-out.

On the intellectual bankruptcy of moral equivalence