Kevin Drum posted a summary of the Sy Hersh article in The New Yorker that I linked to the other day, and very correctly points out that perhaps the most important thing is not that the administration has been looking closely at (and in) Iran. Rather, it is that covert activities in the US have shifted to the Pentagon from the CIA.
Hersh says – with seemingly considerable backup – that the administration has a broad plan to remove covert operations from the CIA and centralize them all in the Pentagon. Why? Because they believe that Pentagon ops are exempt from 70s-era laws that limit covert activities. In other words, no oversight.