So I have read Mead's review now, and I don't have any major problems with it. Mead says that Walt/Mearsheimer could have easily avoided a lot of the charges of anti-Semitism to which they became subject if they had been more careful in their rhetoric, but he gives no examples of the offending rhetoric or of how they could have made their points differently.
I should make it clear that I have not read the Walt/Mearsheimer book. I read the article in "The London Review of Books" that formed the basis for the book, and I am beginning to think that not enough work went into expanding the article into a book. I've now heard too many people of too many different stripes say that the book is not very good in order not to believe that the book is not very good.
Mead's views about Mearsheimer's anti-Semitism seem to have hardened very considerably since the review was written.
The question remains, then, of whether there is an Israel lobby in the US and of what its composition and power are, if it exists. Mead himself appears to say in this dv that an "anti-Israel" candidate targeted by some group or groups can suffer a 20% decline in votes as compared with a candidate who is not so targeted. How many candidates for office can lose 20 points and still win?