Ehh...the Republicans are for the most part responsible for it. Reagan tripled it, and set us on the familiar course of *Tax Cuts! Deficits Don't Matter!*. Bush I tried to reign it in a bit, but his son blew the roof off of it. Obama at least had the excuse of a cratered economy and the resultant loss of revenues.
trump though...inexcusable. Riding high on a recovery...still manages to drive deficits as if we were at the bottom of a recession. That corporate tax cut was appreciated though, as they were able to do all those massive stock buybacks and expand overseas even more. GM pocketed the money and is shuttering plants. And half the American people are apparently saying "Thank you, sir! May I have another?" for having to cover the taxes of corporations out of their own pockets, and their descendants' pockets.
Reaganomics does not f**k work, Republicans. It never has. The GOP "warned" us about something they themselves are largely responsible for via their penchant for slashing revenue without cutting spending.
All this said....trump is a damned Democrat who's pretending to a be a Republican. so lolwtf.