How to get rid of Nicolás Maduro

APRIL 30TH DAWNED promisingly in Venezuela. Juan Guaidó, acknowledged as the country’s interim president by many democracies and millions of Venezuelans, appeared outside an air-force base in Caracas flanked by national guardsmen to declare that the end of the dictatorship was imminent. By his side was a leader of the opposition, Leopoldo López, who had somehow been freed from house arrest. His presence, and that of the guards, suggested that Venezuela’s security forces were ready at last to withdraw their support for Nicolás Maduro, who has ruled his country catastrophically and brutally for the past six years.