Poll reposition: Macri fights back

President Mauricio Macri’s thumping presidential-primary loss in Argentina left the markets fearing a left-wing resurgence. To win over voters, he’s announced a relaxation of some austerity measures. Will it be enough? In the Arctic, wildfires are rampant—and they’ll amplify the very temperature rises that caused them. And, a look at the unlikely rise of Gulf-state book fairs.