About Kurt Waldheim and his past:
Disgraced UN chief and Nazi war criminal Waldheim, dies aged 88
Proved by Office of Special Investigations (OSI), in the Criminal Division of the U.S. Department of Justice who had former United Nations Secretary General and later Austrian President Kurt Waldheim blocked from entering the United States.
And, IIRC, Joe Kennedy, the US Ambassador to Great Britain, was exorting FDR to stay out of the war, don't get involved, and telling him the British were going to fold at any time, right up until he was replaced.
The British, with the aid of aircrew from other nations, stopped the Nazi juggernaut at the Channel, and the rest is History.
Tight package there, when the loose ends are tied together.