This document discusses key aspects of fiscal policy and the federal budget in the United States. It begins by defining the federal budget and its two main purposes of financing government activities and achieving macroeconomic goals. It then explains how fiscal policy uses changes in government spending and taxes to influence aggregate demand and achieve full employment, inflation control, and economic growth. The document also discusses the effects of expansionary and contractionary fiscal policy, discretionary versus built-in (automatic) fiscal policy, and how to evaluate the stance of fiscal policy using cyclically adjusted budget deficits and surpluses.