Someone posted the US has no external debt? I agree that internal and underfunded Gov. obligations are probably higher than external Fed. But denying the amount that China and Japan hold is just silly.
I have posted in ET forums, and this is more than just my personal opinion, that the U.S. has no debt in the sense of private sector debt arising from borrowing. To understand what underlies a statement like this, one must first accept that all money issued by the U.S. government, regardless of form, is a liability of the U.S. government, and also accept that U.S. Treasury bonds are just another form of U.S. money, albeit an interest paying form; yet their great usefulness derives in part from their being neither a part of bank reserves nor of M2. That said, nations that have issued bonds denominated in another nations currency, do have real debt originating from borrowing in the same sense as private sector borrowing.
The U.S., as a matter of established fact and in contradiction to what is commonly believed, does not borrow from the private sector to fund its deficit spending. Instead, it funds deficits by creating new money as needed. Then later it issues bonds in amounts matching the amount of newly created money already spent into the economy. When these bonds are sold, bank reserve accounts are drained in an amount matching the newly created money.* This counters the longer term affect on inflation that the new money might otherwise have had it been left in reserve accounts. Naturally the sale of bonds by the Treasury gives to the general public the appearance of government borrowing to pay for deficit spending. In actual reality however, U.S. Treasury bonds do not fund deficits but instead serve entirely different, but nevertheless essential, purposes.
Consequently what we routinely refer to as the "National Debt" is actually ersatz debt. Even economists who understand these operations will refer to this ersatz debt as simply "debt". There seems to be no other word available that correctly invokes its true nature.
It may be worthwhile for me to point out that although other nations hold significant Treasury bond assets in their U.S. dollar reserve accounts, the vast majority of U.S. Treasury bonds are owned as assets of domestic interests.
For democratic nations with deep sovereignty over their own money and as long as their economies continue to grow, small deficits are a normal fiscal consequence. These nations may, at their option, choose to retire ersatz debt by converting it back into bank reserves as they see fit and as justified by their current monetary policy. Japan, for example, retired about half of their ersatz debt some years ago.
The current clamor over an absurd, nowadays purely political, U.S. statutory debt limit is really about one political party trying to extort concessions from the other. It is not unlike Vladimir Putin's brandishing a threat of using nuclear weapons in Ukraine. Both Putin's army and the Republican party are in disarray. Neither can succeed because neither can explain their machination in a way that makes sense in other than a context of extortion.
_______________
*This step does not change the amount of money in the private sector it only changes its form.