First, Trump is correct to ask Congress to fix it.
Second, Obama did the right thing to protect them while Congress had its head up its ass, as they still do. They would never do anything Obama wanted. Fk them. He had full authority on that, and the states that threatening to sue, would LOSE.
But it is time, to get it fixed. Permanently.
But, we'll have the same thing happen ten years from now, if they don't fix immigration laws once and for all.