I always wondered what Vito meant by "wasn't enough time." The novel states that it wasn't enough time for Vito to "wire" his political contacts into Michael. But, so what? He was planning to move the family to Nevada and go "legitimate."
TB, of course the novel does not contain such a scene. I think FFC put it in there as a way of conveying to the audience Vito's reluctance to involve Michael in the business. I don't think it has anything to do with setting Michael up with the politicians. I think he just meant that there wasn't sufficient time to see Michael embark on a path to become "senator Corleone".
