American hegemony is already in the process of collapsing. It is not about preventing it any more, only about how quickly America chooses to halt it, or not. I'm betting not.
Quick collapse, slow collapse, the results will be vastly different, I think, with other parties taking advantage of the chaos whichever degree it will be.
Our timeline is moving on with or without the US. Electrification is going to happen, the US will just slow down how fast the number will go up. The world isn't reliant on US innovation anymore I imagine so it'll go up regardless.