Many traditional treasury buyers are throttling back purchases or ceasing altogether.
A global reserve currency dies slowly, by a death of many cuts. In the case of the United States, most of these cuts seem self inflicted through perpetuating the warfare state.
With the rise of China and the rising of India, Russia, Brazil and others, dollar dominance is weakening. As a major debtor nation the United States would be wise to keep in mind the lesson Germany is currently teaching Greece.
"The rich rules over the poor,
Proverbs 22:7 RSVCE
It will not take much effort at this point as yields on bonds rise in the near future to unravel US dominance.