Burundians voted Thursday on whether to change the east African nation’s constitution to allow the president to extend his term to 2034, potentially bolstering a trend on the continent of abandoning term limits that has alarmed democracy activists.
President Pierre Nkurunziza, the 54-year-old scion of a political family and former sports teacher, has been in power since 2005 and has steadily tightened his grip. His country, the world’s third-poorest, has been steeped in violence amid a brutal government crackdown on the opposition...