I'm currently working on a personal project of mine (which may/may not be put up around here), and I was wondering - how can we make the Great Depression, especially in the United States, even worse than OTL in such a way as to create a minimal ripple effect, especially in Europe? Ideally, I'd like to make the US dollar worth significantly less than it was OTL in this period.
The only stipulations are that WWI and its aftermath must occur as is, and that Europe either continue into the thirties more or less as OTL, or in even better shape as it (somehow) takes advantage of America's economic mess, with a Germany and Britain that have significantly larger industrial bases by '37-'39.
Bonus points if this create an ultra-isolationist United States as the Second World War erupts whose congress sticks its head in the sand with the fall of Poland.