J Street has a very comprehensive look at American Jewish political opinions. You'll see that Jews massively disapprove of George W. Bush in general, and his foreign policy in particular, and his approach to the Middle East in particular particular. Jews are overwhelmingly backing Barack Obama and Democratic congressional candidates. Jews overwhelmingly favor more aggressive US diplomatic involvement in the Arab-Israeli conflict, clearly believe that only a peace agreement can provide real security for Israel over the long run, and recognize the need for the United States to exert meaningful pressure on both sides to get a deal.