The Trump administration is engaged in open hostilities with the European Union, turning long-simmering feuds over free speech, Ukraine and mass migration into official U.S. policy. Why it matters: ...

The United States’ plan for dealing with Putin’s Russia and Xi’s China remains ill-defined among a shifting global order.

On NATO’s Eastern Flank, low-grade Russian attacks are ramping up. WSJ’s Matthew Luxmoore goes inside Lithuania’s efforts to build defenses and train citizens for war as fears of a full-scale conflict ...