BELGRADE – Weekly protest walks, taking place since 8 December 2018, have become the most serious challenge to the rule of Serbian President Aleksandar Vucic so far. The protests, which are supported but not formally organised by the opposition parties, have spread to more than 20 cities and towns across the country... One of the protests took place in Kosovska Mitrovica, the largest city of the Serb-majority Northern Kosovo, which is governed by Vucic’s political allies. The protests, organised under the title “One of the five million” (a reference to the initial reaction of President Vucic, in which he said...