There are two tracks the U.S. could pursue:
1. Fight for control of fossil-fuel sources and transport routes, maximize profit, and hope for a technological miracle to save the biosphere from overheating.
2. Cut back. Invest in public transit. End sprawl.
Unfortunately the first has been chosen. It will lead to the demise of the U.S. empire, but not in time to save the biosphere. Only an international mass movement can turn this ship around.