Much later it was revealed that at Yalta when Churchill was not in the room FDR several times totally changed his tone to that as a conspirator, casting the Brit in light as being some kind of “outsider”.
I think FDR was much more a collectivist than 95% of people realize.
FDR also did know about what Stalin had done with all the Polish officers in the Katyn Forest in Russia and SAID NOTHING.
In forums, I try to point out that Canada was fighting WWII for two years before FDR's politicking turned into Reality.