Trump is going to increase MUH LEGAL immigration by a lot. Wages are going to go down as result and unions will be gutted. Will police still support Trump when they end up making 18 USD/HR? That's what he means by hardships.
Corporations are going to see a huge increase in profits because they're going to cut labor cost by importing cheap labor.
The goal is to make the middle class disappear and blame someone else for it. The US wants a wealthy upper class and a permanent lower working class. This is why Republicans never act on immigration, legal or otherwise, because it's the best way to lower wages, it's a huge point to campaign on, and many republicans benefit from immigrant H1-Bs and "none skilled" labor.