We all know that FDR had already decided upon a "Europe First" policy before his country even entered the war, and that he meant to hold to that policy; focusing on the Pacific Theater at Europe's expense, much less a separate peace with Germany, was out of the question for him.
What's interesting to me is: (a) there were plenty of factors that easily could have, and arguably in most circumstances would have, led a large section of the American voting public, leaders, etc. to resist these priorities, pushing hard for their country to throw everything she had into breaking Japan; and (b) this did not happen, due to a number of courses of events and/or other contingent factors.
These (a and b) are what I'd like to discuss in this thread. As an example, might the GOP have taken to criticize Roosevelt getting "distracted by Europe" when trying to unseat him in 1944? And depending on how strong such a movement gets, what is the effect on the US war effort?