Pay attention - Trump is running on deporting, sealing, walls, HB1s, denying the US acquiescence of birthright citizenship for illegals.
The whole dang gamut.
Sealing could be done day one or day two of a new president taking office.
You could immediately have troops or Guard members start patrolling the borders; and seal it tightly and quickly.
No administration has done this (recently anyway); there is reason.
Very skeptical anyone would actually do this fairly simple thing.
He is running on Make America Great Again.
Favor America first and second and third in every thing instead of dead last.
He is running on not being stupid about our survival.
He is running on the realistic view that the rest of the world hates us, loves our money and counts on us being stupid and takes advantage of us every time they can.