This work explains the role of the US president in a separated system of government. It shows how such a system works under the circumstances allowable by the Constitution and a two-party structure. It looks at presidents - who they are and how they differ, and the organization of the White House and cabinet, and how both change during an administration. It also covers public support - how it varies and what it means; the continuing agenda and how presidents manage it; lawmaking and how it works; where the president fits into the lawmaking process and how that varies from issue to issue; and reform, particularly how it applies to a separated system.