Here is what I consider one of the best articles I've ever read regarding the influence (or assumed influence) of AIPAC and the Pro-Israel lobby on American politics.

How powerful is America's Jewish lobby?

There's a couple of things I could argue with, but overall very fair. What I find amusing is that if 85 percent of Jews are Democrats and they are so powerful, how come Democrat influence has been declining over the last 30 years? Also if I remember correctly, if it weren't for some poor misguided elderly Jews in Florida that voted for Buchanan by mistake, Gore would be President today. I guess they weren't part of the program. Oops.