The battle over the Trump administration’s executive order on immigration raises weighty constitutional questions involving presidential power and the judiciary’s role in national security, explains …

As military planners review strategy in the U.S.-led war effort in Afghanistan, CFR Senior Fellow Stephen Biddle says victory will be dependent on improving the capacity of the beleaguered Afghan gov…

President-elect Barack Obama assembles his national security team at a time when responsibility for foreign policymaking has shifted increasingly to the White House, says Carnegie Endowment scholar D…

Noah Feldman, CFR adjunct senior fellow and Harvard constitutional law expert, says two landmark Supreme Court rulings send conflicting messages to the world about U.S. adherence to international law.

Retired Marine Lieut. Gen. Bernard E. Trainor, who has coauthored a book on the planning for the Iraq war, says that departing Secretary of Defense Donald M. Rumsfeld will probably leave a “negative …