The usual response is that this would be economically suicidal for the US, and that other ambitious competitors would attempt to create a new world order more s

The usual response is that this would be economically suicidal for the US, and that other ambitious competitors would attempt to create a new world order more suited to their preferences. This would probably anoint China as the next century's global hegemon, although it's at least equally likely that the world would devolve into warring fiefdoms as the world economy imploded. Tens or hundreds of millions of people would die as a direct consequence of this economic malpractice, including a decent portion of the US citizens who voted for the persons responsible. Reelection would be tricky, although it would not be difficult to imagine the US democratic process being suspended as a reaction to the catastrophe (legal precedent is not relevant, see history). Don't get me wrong: climate change is a problem! But this would create a much bigger and more acute problem.