I mean, they unequivocally can continue to issue debt. The question is more "what will the consequences be". And I think the answer is pretty clear that the consequences will be convex upwards while the payoffs will be convex downward to issuing that debt at higher ratio.

We have a balance of trade deficit and our entire relative geopolitical position is based on the strength of the dollar. There of course could be consequences to us of high debt levels