by labor pool you mean foreign labor paid under the table at slave wages w/o benefits or tax collection who meanwhile use US ERs as primary care doctors and US schools to feed and watch their kids for them.
And there have always been aspects of using undocumented labor that are negative and exploitative and I'm all for the US government making real positive changes in this area, but any policymaker coming at this from a non-racist perspective that wanted to make real changes would do it by fining or charging the people who are hiring the immigrants.
Of course, that's not what the Trump administration has done or will do.