WPR Compliance Hearing in the Senate Foreign Relations Committee?

Josh Rogin at The Cable reports that Senators Kerry and Lugar agree that there should be a Senate Foreign Relations Committee hearing on WPR compliance in relation to Libya. So many interesting possibilities there if it actually happens.  For example, will the SFRC attempt to unpack the interagency legal debate, and in particular will it try to pin down how OLC came down (if at all) on this issue?  The administration surely would resist efforts along those lines on privilege grounds.  More interesting, to me at least, is whether Congress will be content with raking an administration representative over the coals at a hearing, or if instead this will become just the first step along the way to a legislative response (as I speculated earlier today).