At the time, Yellen made almost identical remarks: U.S. Treasuries remain the safest liquid asset in the world because the U.S. economy is fundamentally "strong."。Unexpectedly, just three months later, Moody's also announced a downgrade of the U.S. rating outlook, which appeared to be a silent counterattack to the U.S. Treasury.。

As a result, the contradictions of this shutdown crisis have gradually evolved from a tussle between the federal government and Congress to a tussle between Democrats and Republicans, a covert rivalry between Biden and Trump, and a dispute between far-right forces within the Republican Party and House President McCarthy.。