President Joe Biden will call for free preschool for all three- and four-year-old children, a $200 billion investment to be rolled out as part of his sweeping American Families Plan being unveiled Wednesday in an address to Congress. The administration said the historic investment would benefit 5 million children and save the average family $13,000. It calls for providing federal funds to help the states offer preschool, with teachers and other employees earning $15 an hour. “These investments will give American children a head start and pave the way for the best-educated generation in U.S. history,” the administration said. The...