Three Layers of Massive Debt

While the current national debt of $23 trillion is deeply concerning, Americans should be equally worried about the gap between future tax revenues and promised benefits for Social Security and Medicare, which exceeds $56 trillion.
Additional Sources: Treasury Department, Centers for Medicare & Medicaid Services.
Social Security amount was adjusted down on August 9, 2019 to account for intergovernmental debt, which is part of the $22 trillion gross debt.
Updated November 8, 2019
Source: Social Security Administration