In President Clinton's last full year in office (2000), the federal budget was roughly $1.8 trillion dollars. When President Bush was inaugurated in January 2001, his administration received the previous year's $236 billion dollar budgetary surplus. By fiscal year (FY) 2010, a mere decade later, the United States' budget had doubled to nearly $3.6 trillion, and incurred a $1.6 trillion budget deficit. A budget deficit is the difference between outlays (expenditures) and income for a single fiscal year.So how exactly did we get to this point, where our federal deficit is almost as large as our entire federal budget was just 10 short years ago? To answer that question we must explore the concept of deficits and our nation's financial history.