There's a difference between a temporary setback and problems with the fundamentals. This is the case in the private sector and it is the case with sovereign entities, and the people who keep buying US Bonds obviously understand this.

> and the state of the US national debt.

Debt is only a problem if you can't service it. This is doubly true with sovereign debt, where servicing debt provides people a safe place to invest their money.

None of what I said is controversial among people who understand economies. The fact people whine and moan about the USA's debt is a function of how easy it is to score cheap political points by taking advantage of the ignorant.