The rise of the dynamic presidency represents a trademark of modern American politics.  This thesis investigates the significance of presidential influence upon the legislative process by measuring the effects of political context and presidential agency on legislative outcomes, further exploring the cumulative effect of these components upon a president’s attempt to influence the legislative process.  More specifically, public opinion and partisan balance in Congress operationalize the political environment while bargaining and campaigning function as strategies which help explain presidential behaviour.  Together, they form the basis for an analysis of four case studies of domestic policy pursuits during the George W. Bush administration.  Ultimately, this examination reveals that public opinion is a more influential variable in determining legislative outcomes than partisan balance in Congress and the president’s choice of strategies.