Everyone who has heard Trump's extended remarks on the subject of illegal immigration on The O'Reilly Factor in 2011 knows there's not a scintilla of evidence to suggest Trump has flip-flopped on the issue which is presently at the center of his campaign for president. Both National Review and Glenn Beck are mendacious for suggesting otherwise.
During that 2011 interview Trump committed to a case by case method of deciding who among the millions who are here illegally gets to stay and who must go, which shows that Trump is not the uncompassionate Neanderthal he is being made out to be on the subject. He acknowledged that the sheer size of the numbers makes it a formidable problem indeed, but not one the size of which was so large that our government wouldn't be able to work through it. But for that his opponents, who are not just critics, slimily accuse him of supporting a pathway to citizenship as if his position is not substantively different from the get-out-of-jail-free card the Democrats, and some Republicans, would hand out to each and every one of them.
All Trump's other remarks about the subject on that show demonstrate without a doubt that Trump's position about enforcing the border with military if necessary, building a wall and living by the rule of law has been consistent with his clearly stated views over the course of almost two decades.