Tax revenues don't cover it, which is where trillion dollar deficits come from. Those deficits are filled in by bond issues. Those bonds have been increasingly

Tax revenues don't cover it, which is where trillion dollar deficits come from. Those deficits are filled in by bond issues. Those bonds have been increasingly monetized by the Fed: https://fred.stlouisfed.org/series/FDHBFRBN https://fred.stlouisfed.org/series/FDHBFRBN This known as "Quantitative Easing" - which is printing money.