Many theories purport to explain American support for Israel, from strategic considerations to ideological affinity to a strong pro-Israel lobby that has captured Congress. This article argues that domestic politics play a large role not due to the influence of a lobby, but through voter preferences translating into official support. First, the paper documents high levels of public affinity for Israel and demonstrates that policy toward Israel is driven primarily by public opinion rather than by an Israel lobby. Second, it uses five case studies to demonstrate that public support for Israel is based on ideological, rather than strategic, grounds. Finally, it uses these conclusions to make some observations about the future of American support for Israel.