I mean, but they're not feeding into the US's power. So they're like, buying into a depreciating asset. This actively signals the US is losing power to China given that it's _formerly top ally_ is making trading partnerships with one of it's nominal "enemies". Anyone who can think more than a month out, can see this will result in the US losing power in the long run.
Part of the issue is that the average age of the House is ~55 and for the senate it's above 60. So they have a lot less incentive to care about that, or about climate change.
USA will definitely turn into the new Russia if it continues to go on this path. It has already exhausted most of its cultural and moral capital, and its tech sector is already under threat in its major allies. It will continue to stay relevant for maybe a generation or two but it will turn largely irrelevant by the turn of the century, just like the British Empire or Russia today. Assuming, of course, that it doesn't correct course.