Three years ago, conservative activists took over the school board in a small suburb in Texas. They ended diversity initiatives, rolled back LGBTQ protections, and banned books they said did not reflect their values. 

Mike Hixenbaugh, NBC News senior investigative reporter, has been following the story ever since. He says what happened in Southlake inspired a movement that threatens to undermine public education in America. 

Hixenbaugh’s reporting led to the award-winning podcast, Southlake, and the new book “They Came for the Schools.” He joined Diane to talk about one town's fight over race and identity, and the new war for America’s classrooms