ORIGINAL: Mike Scholl
You are overestimating the waning popularity of the "America First" folks, and underestimating the US Public's sympathy for "the underdog".
Mike,
I have to think that if the U.S. populace was as moved by an underdog as you state, the affinity for the Chinese would have bought the U.S. into the war before Pearl Harbor!
While America First might have been slipping as a political movement/party, I don't think the desire of the majority to remain out of the war is fairly tracked by looking at only America First popularity. Roosevelt read this desire, and had promised on multiple occasions to keep us out of the war.
The U.S. declaring war on Japan to insure Singapore was properly returned to the U.K., and Java went back to the Dutch? <--- Really, I think that is nearly an impossibility.
Regards,
Feltan