You know, aside from being symbolic, it's not actually very meaningful in reality - as debt and GDP are measuring two different sorts of things (like for a start GDP ≠ the value of a nation's assets).
Trying to worry about reducing the deficit at this particular point in time would be suicidal; especially when you are the US and you have historically low interest rates helping you along.
Exactly. I would not worry about debt at this point in time. Indeed it is highly preferable to be running a substantial deficit.
It's something to keep in mind. Governments seldom have a problem running a deficit when the situation calls for it, they just rarely rebuild the reserves by running surpluses when times are good. The 2017 tax cuts would have been much better if they'd been implemented now instead of three years ago.