FDR understood that he had Germany by the balls pretty much and demanded their unconditional surrender when he was negotiating with the Valkyrie plotters. Churchill was clamoring for him to give in and let them have a win. While I personally agree with Churchill on that, FDR had every reason to choose the way he did and to keep demanding unconditional surrender. There was no reason not to with America being in the far better position in the long term. Nazi Germany wanted a quick war, not a long one. So you'd naturally have to act against the interests of your opponent.
Truman however was a huge pussy, cried when he got put into office, wanted the OSS to be a newspaper, and then didn't kill off the red menace in it's proverbial teen years like they had killed fascism in it's cradle.
James Burnham, more or less, called for America to lead the world in a super union, like we basically have today but without gay Chinese ownership of production.
