When Donald Trump and the Republicans passed their tax cuts for the rich, they said it would boost the economy and actually increase government revenues (bringing down the deficit). Of course, it wasn't true. That's just the lie Republicans tell every time they want to reward the rich with a tax cut.
It actually ballooned the deficit to about a trillion dollars a year, and it increased the national debt to a new record. For the first time in U.S. history, the federal national debt has reached $23 trillion. If the Republicans stay in power, we can expect that debt to grow by at least a trillion dollars a year for the next few years.