The more I think about the past few years, the more I feel like Trump taking the helm was exactly the plan all along. I mean look at how chummy Obama and Biden were with him at the Carter funeral and the inauguration.
I know it sounds tinfoil-hatted, but Biden and Kamala throwing the election to allow Trump to take the fall with the Ukraine pullout, and subsequent refocusing on China, is exactly the overarching foreign policy that makes sense for the United States here.
With Trump taking over and offering a deal to Russia, the USA gets to pull out of the Ukraine war, while keeping Europe and Russia locked in conflict against each other. Europe is now forced to increase its defense spending (a longstanding goal for the US) while its politics will turn more right-wing in the process. Sanctions on Russia can at least be partially lifted, thus letting American companies continue making bank and having influence in Russia. Even the ambitions to acquire Greenland are a long-standing goal for the USA, and were not originally Trump's idea.
Regardless of what happens, their relationship with Europe isn't seriously threatened -- the Europeans are entirely reliant on the US for making sure they have enough natural gas, and once the pendulum swings back and the Democrats take over again, all sins will be forgiven. After all, we have a precedent for this with Trump's first term. The pendulum swinging back is likely also the point where the Russians get fucked over again, if they take a deal, and if it ends up being a Minsk 3.
In the end, Europe is locked into a conflict with Russia and will be unable to make any deals with China (as US foreign policy goals have been drilled into their minds, they will continue considering China a threat, even when the US is screwing them raw), and Russia will be unable to significantly aid China as they will be locked into conflict with Ukraine and Europe.
Then add into the mix everything that has been happening in South America and the Middle East, and you can see that the US is systematically trying to take out all of China's potential allies for a future conflict. Trump is so far playing his part perfectly.