Access denied: during a Chinese naval exercise, April 2009.

The next U.S. president will inherit a security environment in which the United States con­fronts mounting threats with increasingly constrained resources, diminished stature, and growing uncertainty both at home and abroad over its willingness to protect its friends and its interests. Revisionist powers in Europe, the western Pacific, and the Persian Gulf—three regions long considered by both Democratic and Republican administrations to be vital to U.S. national security—are seeking to overturn the rules-based international order. In Europe, Russian President Vladimir Putin has seized Crimea, waged proxy warfare in eastern Ukraine, and threatened NATO allies on Russia’s periphery. Further demonstrating its newfound assertiveness, Russia has dispatched forces to Syria and strength­ened its nuclear arsenal. After a failed attempt to “reset” relations with Moscow, U.S. President Barack Obama has issued stern warnings and imposed economic sanctions, but these have done little to deter Putin.

To read the full article

  • MAC THORNBERRY is a Republican Congressman from Texas and Chair of the House Armed Services Committee. ANDREW F. KREPINEVICH, JR., is President of Solarium and a Distinguished Senior Fellow at the Center for Strategic and Budgetary Assessments.
  • More By Mac Thornberry
  • More By Andrew F. Krepinevich Jr.