My opinion and your opinion, on what exactly constitutes "just fine" in 1940 are totally irrelevant.
What matters is, what did people at the time think, and nothing could better express their feelings than their strong vote to reelect President Roosevelt for a THIRD term.
FDR did not promise Americans in 1940 to go to war against Nazi Germany just to further reduce their unemployment rate, just the opposite.
In 1940 FDR said, "I hate war" and he promised, "not send American boys into any foreign wars."
Again, I ask, what exactly is your problem with this?
My opinion and your opinion, on what exactly constitutes "just fine" in 1940 are totally irrelevant.
Except, that's what you said about 1940 being "just find"...well before you moved the goalposts with the election angle.