Against the backdrop of modest reductions in the U.S. nuclear arsenal, growing threats from North Korea and Russia, and greater Chinese assertiveness, questions about U.S. security guarantees to its allies are receiving new and critical attention. What kind of commitments do U.S. allies want? What practical steps do they believe would help to address perceived threats? And to what extent should these commitments and steps involve U.S. nuclear weapons as opposed to conventional or non-military capabilities?
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