"Today, the Congressional Budget Office published its annual 10-year Budget and Economic Outlook. According to the CBO’s latest estimates, in 2024 the U.S. government will pass a grim and once-unimaginable milestone. The federal debt has gotten so large that spending on interest to service that debt now exceeds federal spending on national defense.
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In 2024, CBO estimates the federal government will spend $850 billion on defense, compared to $870 billion on interest.
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The lone piece of good news in the CBO report is that these spending caps, if they hold, will in fact reduce the deficit over time, from $2.9 trillion in 2033 under last year’s estimates to $2.6 trillion with the latest estimates.

But $2.6 trillion is still a catastrophically high number. The problem is going to only get worse over time. Under the CBO’s still-rosy predictions of future interest rates, in 2034 the federal debt will rise to $54 trillion (from $34 trillion today).

In the CBO’s long-term projections, interest payments will become the largest line item in the budget—exceeding even spending on federal health care programs—sometime in the 2040s. It’s very likely that sometime between now and then, global financial markets sour on U..S. Treasury bonds as a sound investment, leading to an unprecedented and dangerous economic crisis with rising interest rates, higher inflation, and social turmoil."

https://www.forbes.com/sites/theapothecary/2024/02/07/cbo-federal-interest-payments-now-exceed-defense-spending/?sh=60118c5949d3