The GLCM is likely to prove one of the most vexing foreign policy issues the next president will face. So far, the White House has been reluctant to press Moscow too hard, fearing that the Russians might respond by exiting the INF Treaty altogether and so eliminate remaining constraints on its missile program. But many in Congress and among Washington’s foreign policy elite are eager to see the next occupant of the Oval Office take a tougher stance if the Russians don’t halt deployment of the missile, threatening Moscow with more severe economic sanctions or moving toward countermeasures like the deployment of enhanced anti-missile systems in Europe. The Russians would, in turn, undoubtedly perceive such moves as threats to their strategic deterrent forces and so an invitation for further weapons acquisitions, setting off a fresh round in the long-dormant Cold War nuclear arms race.