To put that in perspective, $457 billion is nearly what we spend on defense every year. It's almost half of what we spend each year on non-defense discretionary spending. It is half of what we spend each year on Social Security. And if we fail to pay the interest... well, let's not go there on a Monday morning, because you really don't want to think about what happens to us when the world's reserve currency ceases being that.
If the interest payments don't break us, Social Security and Medicare/Medicaid will. Without reform, yesterday, those two programs will soon consume every penny Washington takes in, without a one leftover for little things like national defense, border security, or even paying the interest.