(This is all conjecture - I don't really have any evidence for this. I'm a historian, not an economist, after all)
I guess I figure that the economy's really gonna tank at some point. I dunno if it'll be from an inevitable slow-down/crash on China's end (I'm pretty confident it will happen - maybe not now but in the next ~15 years as the Chinese population grows older and huge proportions of their labor force starts to retire - as a Sinologist I'm pretty interested in how the government's gonna react to huge swathes of discontent, too) or from something on the domestic side. Either way, I think things will get bad pretty quickly a la the Great Depression and that this will ultimately lead to another FDR-type (coupled with another New Deal Coalition voter bloc) who comes in and starts reforming things pretty heavy handedly.
But to be honest there isn't really any way to predict the future, really. Climate change and migration patterns are gonna be a whole other factor, with people from the 'Global South' fleeing some pretty catastrophic conditions in favor for more stable countries. I don't really know how the world will react to that. Either way I do think it'll get pretty rough before getting better. OR I could be entirely wrong and we'll get a shift to FDR-style leftism sooner. (As you can probably tell, I really love FDR). Or we'll go down a dystopian corporationist route , though I'm skeptical of that sort of thing.