Former political strategist and pollster Mark Penn talks with Recode's Kara Swisher about his new book, "Microtrends Squared: The New Small Forces Driving the Big Disruptions Today." He describes it as a less optimistic sequel to his 2007 book "Microtrends," but it extends the idea that small changes in politics and the economy are having huge ripple effects around the world. Penn also talks about his past work, advising Microsoft during its antitrust law case and Hillary Clinton during her 2008 presidential run. And he offers some predictions for the 2018 midterm elections, explaining what Democrats could do now in order to reclaim the White House in 2020.