Thanks for the link, Jaime. Looks like there still isn't much hard evidence to support the rumor, and maybe there never will be. It's an interesting story, though. I especially like this part:
"Wayne then relied upon a group of loyal stuntmen who infiltrated communist cells in America and learned of plots to kill him. He then gathered all the stuntmen, went to the communist meetings, and had a huge fight"
Probably would've made a great John Wayne movie!
Welles's comment about Wayne's 'bulbous monument' may have referred to his bulging gut by the late 60's. If so, it would have been a case of the pot calling the kettle black.
Just to take a wild stab at swinging this back to Arkadin territory, Welles said Arkadin was based on Stalin, and the film was a parable of the Cold War. Others have said Van Stratton was based on Nixon who, as Ike's vice-president/bulldog, had more dealings with Kruschev then Stalin, sometimes pretty contentious, as shown in this picture.
But then, the older man/younger man conflict would fit more neatly with a Nixon vs. Stalin scenario, even if Stalin was already dead by that time. It sure would be nice to have a more definite idea of what (or who) Welles had in mind for the characters. I'd settle for Louis Dolivet's thoughts, if he ever made them public. Maybe in those court transcripts of his lawsuit against Welles. I wonder if it would be possible to get a copy of them.