Arlen wants to step up and get smacked down so be it. FISA as they want to use it for the NSA program is an unconstitutional limit of the executives branch's core power, as decided by the courts, by the legislative branch. So yeah Arlen force a show down which when after you expose the details you get shown to be the one acting in an unconstitutional way, that will look great on your resume.
Specter has already said that FISA might be unconstitutional as it interferes with presidential poweres. I think he is going to have it proved.