U.S. missile defense in the twenty-first century is focused on emerging threats from North Korea and Iran, but critics say these systems are too costly and largely unproven.

Targeted killings, especially those conducted by drone strikes, have become a central component of U.S. counterterrorism operations around the globe.

Charges of foreign power interference in the U.S. presidential election have raised grave national security concerns and touched off multiple federal inquiries that could drag on for months.

The separation of powers has spawned a great deal of debate over the roles of the president and Congress in foreign affairs, as well as over the limits on their respective authorities, explains this …

An intense international debate over who manages parts of the internet’s technical infrastructure is likely to feed a broader discussion of internet-related public policy.

The winner of the presidential election this spring will heavily influence how France approaches foreign and domestic issues, including its future with the European Union.