"[A] Court decision adverse to the government will be ... a perfect storm for the ACA in 34 States: no federal funding for the exchanges in those States after January 1 means a near certainty that none of them will move in the direction of setting their own up; without federal tax subsidies the individual mandate would not be in effect for those residents who could not afford coverage without them; the employer mandate would then not be in effect for that population; and adverse selection would force premiums up for those who did access exchange coverage."