Am thinking about this too. It seems clear his main motivation for either staying with deal or leaving it, is how it impacts his re-election chance. If China steps up and buys a lot of agriculture I guess he would stick with it. If China doesn't he could be in catch-22. If he leaves deal, he risks China reducing purchases even more, which would hurt him in key swing states like Iowa and Ohio. He promised them a great deal and they've paid a high price already for his trade war. If he doesn't leave deal Biden could easily attack him for making a 'great deal' that didn't lead to anything… Am interested to hear other views as well