It is not unusual--and not necessarily a problem--for a government to have at least some debt. But how much is too much? Many Americans think the US national debt is too large and want to try to get it under control. By the end of fiscal year 2018, the US government owed around $21.7 trillion in gross federal debt ($15.8 trillion in public debt and $5.9 trillion in intragovernmental debt--money that is owed by one part of the government to another...