Precisely why the current administration passes the Genius Act. from the last treasury issuance fiasco, they already know even sovereigns are shunning US treasuries. The mandatory requirement of needing USD or USD money market instruments as the backing for US stablecoin will inadvertently lead many institutions to again acquire US treasuries, delaying the collapse of US credit markets. In fact, it widens the US treasuries holders' pool from sovereigns and FED to reach retail investors in a way, tying up virtually anyone who owns a US stablecoin.

Is this service the basic accounting and audit  ?

This downgrade comes at a critical juncture as the 30 year long bond is due next year. This downgrade, coupled with damaged credibility due to the tariffs, may result in sovereigns reducing their holdings of US treasuries. Although one might argue not any individual country holds a significant portion of the 36trln debt, the combined amount plus the current administration desire to add additional 3.3trln spending, could mean a 25% (= US$10trln) gap to fill. So while Trump again talking about going back to reciprocal tariffs if no deal is reached, his aides are certainly not doing their job in properly assessing the final outcome.