For many policymakers, economic sanctions have become the tool of choice to respond to major geopolitical challenges such as terrorism and conflict.

The United States and other Western countries are reevaluating their foreign investment regulations amid an uptick in Chinese interest in strategic sectors.

The extradition process enables governments to bring fugitives abroad to justice, but it can be fraught with political tension, even when a treaty is in place.

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 …