BRUSSELS ― Europe’s leaders are in the fight of their lives. For the first time, the summit they hold this week will zero in on topics aimed at reclaiming turf from the far right. Mainstream politicians ― center-right, center-left and liberal alike ― have been in power in Europe since World War II but are watching their control ebb away. They hope Thursday’s European Council will show that the EU cares about issues that have left voters feeling disaffected. In the bloc’s biggest capitals, from