He already did.
"U.S. economy accelerated during first full Trump quarter"
The economy also benefited during the second quarter from increased federal government spending.
What do you figure that means? See, by constructing things and spending money, for example a wall, you will create alot of jobs. That is a way to expand the economy. But you know, that doesn't last forever and it will just increase the debt. So, the investments better be good, and a wall certainly won't be giving any ROI.
So, who do you figure will pay for all that increased debt? Mr Trump will have ran away by then, i assure you.