Wait until he decides that, being the King of Debt, which he proudly proclaimed, decides the U.S. should have a lot more of it. And his Republican Fausts in Congress are going right along claiming the increase in the economy will wash out the extra money they are willing to spend under Trump which they were unwilling to spend under Obama.
They love to point at Kennedy and Reagan. However, when tax rates are relatively high, you can get a big bang for your buck lowering them...all other things remaining equal. In today's economy, tax rates are relatively low, lowering them further won't get the same return. Worse, companies are learning to treat every down cycle as an excuse to automate more, and now the economy is gotten very good at providing that extra automation.
There is story about the oil fields in Texas. The price of oil is back up, they are pumping more. Do the jobs return? Bzzzzzt, wrong. The companies got lean by automation during the low oil price years (those that survived are now the leanest of the lot), now they simply crank their machines and computers harder. No real increase in jobs, Trump and his mercantilist economy cannot exist. In that sense, Trump fails to exist as well.