Borrowing from our own “investment” T-Bonds... which are of course NOT owned mostly by US citizens... more like institutional buyers (insurance) and.... the chi-coms. Just perfect!
No, the SSTF contains interest bearing T-bills that were purchased using payroll taxes. The SSTF is held as Intragovernmental debt as distinguished from publicly held debt. The public debt is $19 trillion and intragovernmental debt is $5.9 trillion.