Don’t ask questions. Just tell him the President and Congress are responsible for our existing immigration laws being strictly enforced.
Oh I don't know, how about:
Since the president could have gained the credibility to discuss immigration by sealing the border during his first six years after 9/11, why is he throwing a tantrum and rolling around in the dirt crying and screaming now? He could have had the ante to be allowed to play in the game but he chose not to. Why is he blaming other people for his lackadaisicalness? Most other people chose, at some point to grow up.