Why is Arnold Schwarzenegger fighting for more competitive politics? He tells David Rennie, the Economist's Lexington columnist, that politicians in gerrymandered seats are like overweight people who should go to the "fucking gym". Also, Anne McElvoy, our Senior Editor, and Tom Wainwright, Britain Editor, tussle over the many versions of Brexit. And South Koreans rally against the elitist education system. Josie Delap hosts.