Taiwan, primarily, along with power projection in the Asia region, protecting maritime trade (Mahan). Nuclear missiles for the same reason every superpower worth its salt builds a nuclear arsenal.
The only constant is change.
Any dealing with China must come with the understanding they will work in their own interest, as all nations do. If the US tries cutting them out of global trade, the consequences will be incredibly destructive. Give them nothing to lose, see what happens. Likewise if they rolled over and let China do whatever they like it would be very negative. China heavily subsidised its industries, effectively bought and shipped the entire German solar panel industry over to China. Chinese domestic demand is suppressed through currency manipulation of the RMB to make exports more competitive.
Something akin to the Plaza Accords of the 1980s could go some way to rebalancing trade, a revaluation of the RMB would increase domestic Chinese consumption considerably. This would not solve all issues regarding trade or geopolitical issues regarding the US, EU and China but it would be a step.
The problem the US has is the catch-22 of a high debt and the way out of it being to raise interest rates. Doing so causes the repayments on the interest on the debt to, obviously, increase, but to not increasing interest rates means more money printing, more debt, and on it goes