The United States is on a fiscal collision course. Decades of unfunded entitlement promises, demographic changes, and a dysfunctional political process combine to drive the federal budget deep into debt. This poses a threat to the American economy and prosperity. According to projections by the nonpartisan Congressional Budget Office, public debt is projected to approach 100 percent of gross domestic product in the next 10 years and will continue growing on a rapid upward trajectory from that point.