Isn’t deficit spending forever a good definition of “unsustainable”?
P.S. This bit about domestic spending has been going around but I am not sure how much it’s significant. I suspect that either the President is completely clueless about reality, has managed to misspeak the same way multiple times, or being deliberately disingenuous and counting on Old Media covering for him. What we do know for sure is that he’s not serious about it.