Nearly 3 million of Hong Kong's 4 million registered voters expressed their disapproval of the city's current government in a decisive local election on Nov. 24 that reduces the Hong Kong authorities' political potency and also gives the opposition and protest movement a mandate to push against Beijing's control. In theory, the huge electoral victory gives only a marginal political boost to the opposition in an institution that is otherwise heavily tilted in favor of the pro-establishment forces and ultimately controlled by Beijing. Nevertheless, the opposition now has much stronger backing to promote its pro-democracy agenda....