Yep. He lost me when he said Darth Sidious 'might' be Karl Rove. That is stretching things too far and trying to read meaning in everything.
And I am certain i can take anything, from the theatrical presentation of 'Little Women' to the made for TV 'War and Peace' and, with a smidget of imagination, find allusions and parallels with 'current events' as well as 'proving' how the characters are alluding to current politicians. And I would definitely make it seem stronger than saying Darth Sidious (Palpatine) 'might' be Karl Rove.
Palpatine 'might' also be the Easter Bunny and Sasquatch rolled into one.
Sometimes people read too little into some things, and too much into others. This is one case of someone seeing bogeymen under the bed where there are none. While there are certain allusions (for example strong ones with the rise of Nazism), it would be folly trying to see the entire Bush cabinet in SW:ROTS.
What do you expect from a man [Lucas] who's life work is the plagerism of other's ideas and concepts?
Back on topic: I'm hearing alot of complaints about acting. The key subplot in this episode was the conversion of Skywalker to Vader - everyone I talk to says the actor was not up to such a challenging role.