Personally I’m of no particular mind about the circumstances of Rudy Giuliani’s departure from the so-called Iraq Study Group thirteen months ago.  What ought to disturb GOP primary voters is that he was ever a part of the ISG at all.

This sentence from the Newsday story says it all:

Giuliani left the Iraq Study Group last May after just two months, walking away from a chance to make up for his lack of foreign policy credentials on the top issue in the 2008 race, the Iraq war.

Doubtless Rudy didn’t want “foreign policy credentials” that put him on the side of the cut & run crowd.  But is it really believeable that he didn’t know that was the ISG’s ideological orientation from the git-go?