Peter S. Goodman writes for The New York Times: “Despite a substantial increase in federal support for subsidized child care, which has enabled some states to stave off cuts, others have trimmed support, and most have failed to keep pace with rising demand, according to poverty experts and federal officials. That has left swelling numbers of low-income families struggling to reconcile the demands of work and parenting, just as they confront one of the toughest job markets in decades. “