I apologize for implying 'dumb' -- however, it's aggravating to hear such naive 'static' views of an economy continue to be parroted.
We have run a large deficit in the US, because of the major recession, which started in 2000 after the 90's bubble and was accentuated by the 9/11 blow and the need to spend money on a military response. However, you should note that, since the tax cuts, the deficit has been declining. QED.
Seems to me that government debt doesn't necessarily matter unless it's causing inflation.