Pull my finger
Donald Trump can't make it any more obvious that he wants to empty this country of people originating from Mexico and other Latin American countries. He uses the illusion that they have to leave temporarily and when they "get in line" to apply for citizenship, they will become (finally) U.S. citizens.
Except . . . . Trump is also saying not all applicants will be granted citizenship if by his standards they are useless.
"We take anybody. Come on in, anybody. Just come on in. Not anymore.
You know, folks, it's called a two-way street. It is a two-way street, right? We need a system that serves our needs, not the needs of others. Remember, under a Trump administration it's called America first. Remember that.
To choose immigrants based on merit. Merit, skill, and proficiency. Doesn't that sound nice? " asked Trump."
http://www.cleveland.com/darcy/index.ssf/2016/09/trumps_merit-based_immigration.html
There would be a two-tiered system where some returning Hispanics would be allowed back into the U.S. and others, well, not so much.
In other words, a lot of Hispanic people would be tricked into leaving with the expectation of being reunited with their families still in the U.S., to be given their old lives back, and to be granted U.S. citizenship when in fact, Trump is giving no such guaranty. In fact without so much reading between the lines, Trump is telling them "Get the Hell out of here and don't come back."