The relationship spans trade, technology, military competition in the Pacific, human rights, and cooperation on global problems. Policy debate turns on whether these can be handled separately or whether the relationship is fundamentally adversarial.
Economic integration is deep. The two economies are each other's major trading partners in many categories, and supply chains for electronics, pharmaceuticals, and critical minerals cross between them extensively.
Competition is sharpest in advanced technology. Export controls on semiconductors and equipment, restrictions on investment, and controls on critical mineral exports have all been used by both sides as instruments of policy.
Taiwan is the most dangerous flashpoint. American policy has long combined recognition of one China with unofficial support for Taiwan and deliberate ambiguity about whether it would intervene militarily. Whether that ambiguity still deters or now invites miscalculation is actively debated.