It's interesting that most of the McCain/Rovian/Bush options to attack Obama's National Security and Commander-In-Chief credentials are dwindling: Iraq timetable - no, Diplomacy with Iran - no, War on Terror/Afghanistan - no, Friendliness with Israel - no... Hence, the ridiculous new Obama/Brittney Spears/Paris Hilton ad hits the airwaves.
It seems McCain '08 has nothing productive to add to the discourse, and now they don't have much to attack either.