host: a lot of references to doccca and doppa. guest: doppa is deferred action for children.: lettershost: for this in terms of how many families and children are involved in this. as you can see on the screen and if you are listening on c-span radio, the childhood arrivals between 2012 in 2014 i for 1.4 million children. accounted for 1.4 million children's and the parents, 3.6 million so a lot of people involved. guest: absolutely. host: your piece available online. the chief justice of the united states, john roberts, is the one the white house is pay particular attention because it remains a 4-4 court with the death of justice antonin scalia. how is the solicitor general framing the argument? guest: that's right. with it being a 4-4 court, the only way for the obama administration to win this case and implement any part of it before he leaves office is to win over chief justice roberts or chief justice anthony. they are making an argument that seems like the kind of argument you would make if you have roberts in your sights. 26 states led by texas who filed this lawsuit.