I think Trump is pushing this for a purpose unrelated to the Trump U case.
His statement has caused a tremendous amount of visibility and the resulting sunlight has everyone responding “in the moment” - without tons of thought or carefully planned speeches. In this way, Trump is getting all of the illegal immigrant hucksters to show everyone exactly who these people are. Every stupid, emotional, thoughtless thing they say is ammo for him later.
Bye bye Newt ~
They are certainly stupid enough to pounce without thinking...love it.