Michael could have made Fredo Consigliere and then make Fredo think he was advising him when all the time Michael was running the show, and still keep him in the dark when necessary. Also he should have put a tail on Fredo.
"Io sono stanco, sono imbigliato, and I wan't everyone here to know, there ain't gonna be no trouble from me..Don Corleone..Cicc' a port!"
"I stood in the courtroom like a fool."
"I am Constanza: Lord of the idiots."
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