What should America's role be in the current geopolitical situation?

The post-Cold War "unipolar moment" is clearly over. The U.S. remains the most powerful country in the world, but faces a more assertive China, an aggressive Russia, and a fractured Middle East. American foreign policy is in an unsettled moment. The range of views is wide: retrenchment advocates say we should focus on domestic priorities, let allies do more, and avoid entanglements. Engagement advocates say American withdrawal creates power vacuums that adversaries fill. Competition advocates say we must actively contest Chinese influence in Asia and globally. Multilateralists push institutional solutions through NATO, the UN, and trade agreements. Each position has a coherent logic. Each also has failure modes: withdrawal invites aggression; engagement overextends; competition risks hot conflict; multilateralism moves slowly and requires trust. What framework should guide U.S. foreign policy over the next decade? What are the actual priorities? And given political polarization at home, what's actually achievable?