In Serbia, the prime minister's resignation will not quell escalating anti-government protests, increasing the likelihood of early elections and posing a serious challenge to President Aleksandar Vucic's rule if the opposition can overcome divisions; in an even more escalatory scenario, Vucic could escalate tensions with neighboring Kosovo in a bid to deflect domestic pressure, heightening the risk of regional instability and ethnic violence. On Jan. 28, Serbian Prime Minister Milos Vucevic resigned amid ongoing mass protests over the recent deadly collapse of a railway station roof in Novi Sad, Serbia's second-largest city, which demonstrators have blamed on government corruption. Initially student-led, the protests have since expanded, drawing in broader segments of society. On Jan. 27, farmers joined the rallies and blocked streets in Belgrade and other cities, further increasing pressure on the government. Vucevic, a close ally of President Aleksandar Vucic, had served as the mayor of Novi Sad when...