Out of interest, just what sort of strategic situation would need to be in place for the US to fall back on fortress America and end up negotiating peace terms with the axis, no win no loss situation.
This assume that otl occurred through to 1/1/42.
I could see it happening with an axis conquest of Britain as far as the Germans/Italians were concerned, but not sure about Japan. (please no diversions into sealion).
Your thoughts appreciated,