Western countries, including US and EU, are on a slow path of decline. The lessons of WW2 about the value of cooperation are forgotten. Trump creates a lot of mini crisisses, but these are as easily resolved as they were made by the next president. As a result, a lot of captains asleep at the wheel are getting a rude wake up. Meanwhile, there is a sanity to go back to.
The EU finally gets serious about defence. Countries start doing thing without asking US permission first.
In the US, the left is still in denial, but they keep getting whacked. They are also under shock and awe from the ongoing Trump legal blitzkrieg. But that won't stay. What's happening now will start a counter reaction, it's just too bizarre and extreme. Once they get themselves organized and fighting, they'll be a huge counterforce. Congress might start working again, and maybe some new amendments will even happen.
I don't think the USA will return to absolute top dog status again, rather I think we end up with a multipolar world. But hardship will teach some much needed lessons.