Based on what? You can't trust him for his opportunism. He also hired one of the biggest pushers amnesty in the GOPe to be his campaign manager. I would trust that to be more indicative of his position on amnesty than anything he says. If he was really a hawk on immigration he would never hire that person.
Did you note that I am not a Trump supporter?
I don’t trust Trump. I expect that, if he wins the Primaries, he will turn around and say “Well, that was just a negotiating stance.”
But it wasn’t for Trump the Illegal Immigration issue would hardly be out there all.