Bonnano pretty much did have Canada with the help of Galante. As to your question about Giancana having a beef with Anastasia over Scalise, Bill Bonanno gives an account of it in his last book, claiming it was over Scalise selling membership, but the rumor is that Scalise had a few soldiers in the gambino crime family moving drugs through Chicago as a pipeline without any permission. One of those involved was Salvatore Maugeri of San Francisco.