Yet, entertaining as all this political drama may seem, the theater itself is indeed burning. For the fiscal position of the federal government is in fact much worse today than is commonly realized. As anyone can see who reads the most recent long-term budget outlook—published last month by the Congressional Budget Office, and almost entirely ignored by the media—the question is not if the United States will default but when and on which of its rapidly spiraling liabilities.

True, the federal deficit has fallen to about 4% of GDP this year from its 10% peak in 2009. The bad news is that, even as discretionary expenditure has been slashed, spending on entitlements has continued to rise—and will rise inexorably in the coming years, driving the deficit back up above 6% by 2038.

A very striking feature of the latest CBO report is how much worse it is than last year’s. A year ago, the CBO’s extended baseline series for the federal debt in public hands projected a figure of 52% of GDP by 2038. That figure has very nearly doubled to 100%. A year ago the debt was supposed to glide down to zero by the 2070s. This year’s long-run projection for 2076 is above 200%. In this devastating reassessment, a crucial role is played here by the more realistic growth assumptions used this year.