A strong and united party leadership is vital to victory, Chinese President Xi Jinping said in a keynote speech on Thursday marking the 90th anniversary of the victory of the Long March. Speaking days before an important Communist Party meeting known as the fifth plenum, Xi said the party managed to turn the tide of defeat into a path to victory 90 years ago because it rallied around the leadership of Mao Zedong. By linking the Red Army’s historic endurance with today’s geopolitical struggles,...