My tinfoil hat seeing Trump Admin wrecking havoc in the American continent is that they (or Trump specifically) believed that contesting American hegemony in Pacific within 1st island chain or even 2nd island chain is herculean task and it will be harder and harder as time goes due to the tyranny of distance and PLA modernization . So now the policy is American redoubt where US assert unanimous influence in the American continent while slowly recognize other great power's sphere of influence. Even hawkish Rubio already wrote about multipolarity.
Retreat to Fortress America is also a response to nuclear proliferation, which will occur as the US retreats from its role as world policeman.
Another factor is the desire to retire federal government debt by dollar devaluation. Onshoring of manufacturing by high tariffs would be preparatory for this.
