In front, and centred: Joe Biden

The former vice-president has shifted leftward with his party, but it is his centrist tendencies that make him electable—and could permit him to effect radical change. Emmanuel Macron, France’s president, is reshuffling the government; why has he chosen a largely unknown mayor as the new prime minister? And the rhymes and reasons behind rap music’s surge in the Arab world. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer