When Tom says that he always thought that it would have been Clemenza, Michael's reply is "It's the smart move" followed by "Tessio was always smarter."
Exactly right DC.
Clemenza was always being suspected of being a traitor...they though he helped Paulie sell out 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!"
