Babbage: Can the American election be hacked?

In the second episode of Economist Radio specials running up to the presidential election, security expert Bruce Schneier examines vulnerabilities in electoral voting systems. We hear from Dr Darren Schreiber about whether our political inclinations are hardwired. Also: what impact is big data having in this year's election? Cheryl Brumley speaks to online campaigning expert Dr Matt Hindman