Under Trump, the national debt rose from about $19.9 trillion to about $27.8 trillion, an increase of about 39 percent, and more than in any other four-year presidential term. It happened mainly because of Trump’s enormous tax cuts for wealthy Americans and big corporations. The Trump and George W. Bush tax cuts have added $10 trillion to the debt since their enactment and are responsible for 57 percent of the increase in the debt ratio since 2001. They’re responsible for more than 90 percent of the increase in the debt ratio if the one-time costs of bills.