I don't trust him yet on this issue myself, but the links people put up are a bunch of crap. He's from Wisconsin, a state that doesn't deal much with this issue. If he declares, he will have to study it, make pronouncements on the issue, and say what he will do about it.
Until then, the people here that KNOW he is an amnesty shill can shove it where the sun don't shine, becuase none of them know anything.
Full disclosure: I prefer Cruz, but am not going to be a lying shill (like some here are) to help get him the nomination.