He did it by exploding the deficit (bunker busting tax cuts). Basically taking money from America's children to give to America's adults, who are too miseducated to realise.
You're comparing it to the middle of an enormous economic crash, and even then relying on an estimate of 4% which is high outside of an economic crisis/recession. Let's wait until the tax cuts have kicked in for a couple of years and then count it, but even by the estimates on the link you provided it's spending as if you're in an economic meltdown when you're not, and high by historical standards.
