Winston Churchill had trouble convincing Roosevelt to go for total victory, if even that. Roosevelt was swayed by Uncle Joe. Read it for yourself in Triumph and Tragedy: Closing the Ring
Oh, I agree. And I should have added in my original post how lucky the West was that Churchill was in power at just the right moment in history.
FDR and Churchill did not make the perfect team. But an isolationist president in 1940 would have been disastrous.