Since the act was rushed into law within 1 month after 9/11, with absolutely minimal debate, perhaps he feels that support has waned. Personally I don't want the FBI to be able to walk around wiretap regulations because of a hunch, which seems to be a component of the act. I also am pretty concerned about their Carnivore system on the internet. They're using it as a way to preserve "freedom" whatever that is, but it seems like that's exactly what we're giving up. I can see serious opposition to these changes, both from republicans and democrats. I think people might consider it pretty knee-jerk, now that they look back at it, when back in 2001 people were pretty terrified.