Sigfrid puts this in perspective. The debt is too high to repay. Servicing the debt is going to come home to roost soon. I recall a friend who spent himself into a hole and was only able to pay the interest. You can write the rest of the story.
The US can print money but it only makes things worse. I worry about what the near future holds and we let politicians bring it on us. Maybe they can tax religions to help pay the debt back? But it still won't be enough...