Amendment X The powers not delegated to the United States by the Constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the People.
That was the status quo ante before 1974. If she were a Constitutional conservative, she would know that.
True. Criminal law is the province of the States except on Federal reservations and in DC. And it does NOT provide that the states must allow and promote the murder of some particular class of persons.