By Joe Zumburn, Feb. 3, 2015, Wall Street Journal

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. Forecasters at the White House and Congressional Budget Office believe interest rates will gradually rise, and when that happens, the interest costs of the U.S. government are set to soar, from just over $200 billion to nearly $800 billion a year by decade’s end.