This is from the New York Times:
When does this nonsense stop? Republicans aren’t deficit hawks. They haven’t been since the Reagan era. Republicans used to be deficit hawks, but the whole point of the Reagan Revolution was that tax cuts were more important than deficits. Their only concern about the deficit these days is as a handy excuse for opposing any increase to social welfare programs.
I know I’m a partisan, but the evidence behind this is about as clear as it could be. Read up on the Reagan tax cut. It took about a decade for the GOP to completely shake off its historical aversion to deficits, but George H. W. Bush’s tax increase in 1990 was the final straw. Since then, deficits have been a rhetorical trope, but nothing more.