Let's check in on how Jared and Ivanka's luxury Albanian resort is doing...

[Bluetus]

35. The deeficit is almost $2 trillion a year.

Our national debt is a touch under $40 trillion.
Our GDP is about $32 trillion. When a country's national debt is greater than the annual GDP, we consider that a failed economy. Our debt iw 125% of GDP.

Nothing really prevents deficit spending, as Reagan proved. Many economists believe that when you debt gets above 110% ,you end up spending so much on debt service that the only choice is to keep "printing" money, and eventually that collapses.

So when you ask, "How much is left in teh treasury?", another way to ask that question is, how much longer will other nations keep buying our T-bills. Foreign nations own about $8 trillion of our debt outright. But there are trillions more in the hands of oligarchs all over the world, and they often conspire as a group -- see Davos.
https://usafacts.org/articles/which-countries-own-the-most-us-debt/