WSJ
The U.S. has come a long way since the days of trillion-dollar deficits, just a few years ago. The White House projects 2016 will have the smallest budget deficit in eight years. Yet the budgetary impact of the debt that’s been accumulated–$18 trillion in total, $13 trillion of that owed to the public–will reassert itself.
Currently, the government’s interest costs are around $200 billion a year, a sum that’s low due to the era of low interest rates.