By 2035 the Debt Will Be So High the CBO Can No Longer Estimate the Damage to the Economy

This is kind of scary (from James Pethokoukis):

A stunner from the Congressional Budget Office in its new long-term budget forecast.  When the government budget scorekeepers took into account the worst-case scenario impact of debt on the U.S. economy, its economic forecasting model, well, broke:

Under the assumptions leading to the most negative effect on GNP, debt would reach 250 percent of GDP by 2035. CBO’s model cannot reliably estimate GNP after debt reaches that amount, in the agency’s judgment: The assumptions about private saving and capital inflows incorporated in CBO’s model are based on historical experience, and if interest rates and the debt-to-GDP ratio rose to levels well outside of that experience, those assumptions might no longer be valid. In 2035, GNP would be 21 percent below the benchmark under the assumptions leading to the most negative effect on GNP; beyond 2035, the negative effect on GNP would grow under those assumptions as debt continued to increase relative to the size of the economy.

The above chart show the U.S. economy in a long recession starting in the early 2020s and then just … stopping. There be dragons!

Debt is so high, a massive 250% of GDP, that the CBO can no longer calculate its harmful impact on the economy, though one can assume the direction is down.

I think the term "massive collapse" will be operative in that scenario.