The Republicans are all in the process of taking back what belong to people already, so why can they not take away visas and permanent residency, already granted these immigrants who just happen to be on the wrong end of the border at a particular point in time, while America looks on.
After all these rich media moguls and white, privileged and comfortable Middle ClaSS America, are not complaining while Republican legislators and Trump are doing the same thing in the case of Obamacare which people are enjoying and is now being taken away from those who have no problems with it and nothing to replace it.
Trump can do what he is doing simply because Americans never really really fight for justice but for interests, and if your interest group is weak in America, expect to be treated like a doormat.
Did Thomas Jefferson not enslave thousands of black people while mouthing off on the most wonderful prognostications for human worth, freedom and justice?