Vito without Michael didn't have the muscle to win, even against tattaglia. Had he made a move on Tatt, all the other families and Barzini leading the charge would have gone after Tessio Clemenza and Vito.
"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!"
