OTL is something of an ameriwank, with the USA being the #1 economy from the 1880s until at least 2030-ish, being currently the biggest military spender in the world by a very wide margin, and having much of the world in its direct sphere of influence.
So my question is this: with a PoD no earlier than 1900, how would you make the USA crash, burn, and fail spectacularly?
The worse off it is internationally, the better; it should at the very most have the #3 spot in the world economy. Bonus points if you can do it without a nuclear war.
For me personally, I think a civil war following the great depression might do the trick.
A side note, if this is an anti-ameriwank, would this be an "ameribuggering?"