You hit the nail on the head. The press wants a Nixon moment.
The problem is that for all the hysterical whinning, hand ringing, and lying the Bush Whitehouse is probably the most scandal-free of any in memory. For all his other failing Bush is so squeaky clean that the have to resort to making up scandals: Plamegate, the NSA nonsense, etc.
The 'rats can't stand it the Clinton was a criminal and weirdo and Bush is not. Its literally driving them insane.