The Israel Lobby by John Mearsheimer and Stephen Walt
The bottom line is that AIPAC, a de facto agent for a foreign government, has a stranglehold on Congress, with the result that US policy towards Israel is not debated there, even though that policy has important consequences for the entire world. In other words, one of the three main branches of the government is firmly committed to supporting Israel. As one former Democratic senator, Ernest Hollings, noted on leaving office, ‘you can’t have an Israeli policy other than what AIPAC gives you around here.’ Or as Ariel Sharon once told an American audience, ‘when people ask me how they can help Israel, I tell them: “Help AIPAC.”‘