The incoming U.S. president inherits a raft of national security problems during a time of financial tumult and great uncertainty. Iraq, Afghanistan, the hunt for al Qaeda, border protection: the list is already endless yet still seems to grow by the day. And all the while, the national deficit grows. How should President Obama prioritize among the many competing demands for defense spending, homeland security investment, diplomacy, security assistance, and related measures? How much money will be needed? How much will be available? And how should it be allocated? These are the details that can define a nation’s foreign policy.