MANAGUA, Nicaragua—The children and grandchildren of Nicaraguan revolutionaries who fought alongside Daniel Ortega to topple a dictatorship four decades ago are now leading a movement to oust him from power.
The nation’s largest public university, once a stronghold of Mr. Ortega’s leftist Sandinista revolution, has become a command bunker for a student-led revolt. The government is loath to dislodge the several hundred student rebels holed up at National Autonomous University, where dozens of barricades made of paving-stone...