Despite its efforts to promote peace and instil democracy in the region, America is viewed by many in the Middle East as a dishonest broker waging a 'dark crusade' against its enemies: in covert collaboration with Israel. The crucial hostility to Arab and Palestinian interests of the so-called 'Zionist lobby' in the US has long been recognised. But it is another less familiar element in US politics that increasingly calls the shots on Capitol Hill, directing the course of American foreign policy there: Christian Zionism. Christian Zionists now influence not only the Republican Party, but also the White House and Congress.Protestant fundamentalists anticipating the end of the world, they have long made common cause with the most extreme political elements in the state of Israel. But why? Jews and fundamentalist Christians hardly look like natural allies. Adhering to a feverish apocalyptic ideology, Christian Zionists nevertheless believe that restoration of the entire biblical Holy Land to the Jewish people will result the thousand-year reign of Christ. During his eleven years working in the Senate, the author observed at first hand the deep-seated influence of Christian Zionism on American foreign policy, and is uniquely qualified to assess its significance. Dark Crusade offers the most nuanced analysis yet written of this dangerous and complex phenomenon.