QuoteSpeaking purely to be informative and not to continue the politics, greencapt accurately pointed out the couple lines that lead many at the Cannes festival to call the movie anti-Bush.
Originally posted by: greencapt
The 'Liberty' line and Anakin's line about "If you're not with me then you're my enemy" are the main things that I've read people quoting as being a commentary on our current political situation.
Personally rather than say that ROTS is anti-Bush, I'd prefer to think of it as Bush being *pro-Sith*!
It should be noted, however, that no matter what Lucas' political leanings are, he has come out and flatly denied it, saying that the movie was written (in the general sense) during the end of the Vietnam War.