Call me crazy but if you keep borrowing money that you can’t
pay back and make no attempt to pay down the principal or
stop spending, wouldn’t that make you a poor credit risk?
So where is the unexpected surprise?
Whatever plan reaches obumblers desk won’t cut nearly enough. I suspect that will be the medium term.
A debt downgrade is no big deal, and is already fully expected by the bond market and is fully priced into treasury bonds. If a downgrade occurs, the treasury bond market will sell off for a few weeks at most, and then bounce back to where it was before the downgrade. There won't be any long-term impact on interest rates from a debt downgrade.