In 2013, San Antonio launched its Pre-K 4 SA program, providing full-day pre-kindergarten for disadvantaged 4-year-olds. Erick Trickey talks with host Krys Boyd about how then-mayor Julián Castro pushed the program through the city’s bureaucracy – and about the potential for pre-K to strengthen a city’s economy. He wrote the story “How Julián Castro Bet on 4-Year-Olds to Transform San Antonio” for Politico.