"Even if the State may decline to subsidize or to participate in the exercise of a woman's right to terminate a pregnancy, and even if a State may pursue its own abortion policies in distributing public benefits, it may not affirmatively constrict the availability of abortions by defining as "public" that which in all meaningful respects is private. With the certain knowledge that a substantial percentage of private health care providers will fall under the public facility ban, see Brief for National Association of Public Hospitals as Amicus Curiae 10-11, Missouri does not "leav[e] a pregnant woman with the same choices as if the State had chosen not to operate any public hospitals at all," ante at 492 U. S. 509; rather, the public facility ban leaves the pregnant woman with far fewer choices, or, for those too sick or too poor to travel, perhaps no choice at all. This aggressive and shameful infringement on the right of women to obtain abortions in consultation with their chosen physicians, unsupported by any state interest, much less a compelling one, violates the command of Roe."