Which is, of course, a lie.
The US may not be able to
And it will. Anyone who states differently is either ignorant of the law or, more likely, is a liar.
There may be severe spending cuts, but the US debt will be paid. Personally, I hope we reach the debt limit and start living on a balanced budget.
New mortgage rates may increase, and new loans may be a bit harder to get and my be more expensive, but old ones won't increase until the end of their term...
Of course, it is more likely that the GOP will fold and allow a debt limit increase.