This book provides an in-depth analysis of the relationship between the legislative and executive branches in the American political system, focusing on the mechanisms of power-sharing, conflict, and cooperation between Congress and the Presidency. Louis Fisher offers a historical and constitutional analysis of how this relationship has evolved, supported by key documents and events. The book demonstrates how political and legal decisions have impacted the balance of power within the U.S. system. It is an essential reference for understanding the constitutional and institutional dynamics of American democracy and the challenges to the separation of powers.