Pretty much everyone agrees that the US fiscal outlook for the long-run - a few decades into the future - looks grim unless changes are made. Here's are estimates of the ratio of accumulated federal debt/GDP throughout US history, and projected up through 2050, from a Congressional Budget Office Report in March 2017. The spikes of government debt during wartime, the Great Depression, and the Reagan and Obama administrations are clear. The trajectory forecast would take US government debt outside past experience
http://www.talkmarkets.com/content/economics--politics/the-us-fiscal-outlook?post=145127