The U.S. has $19.2 trillion of debt, equal to 105% of GDP, not including entitlement programs. With few exceptions, no one seems to care. This is the highest debt-to-GDP ratio since the Truman administration, but President Truman inherited high debt levels after the U.S. fought two world wars. If interest rates go up by two percentage points, that is another $380 billion a year in interest payments, which the country can’t afford.
~ Scott Black, "Barron’s 2016 Midyear Roundtable: 24 Investment Ideas," Barron's, June 12, 2016