The political showdown over the delivery of aid to Venezuela turned deadly Friday when its security forces fired on protesters near the country’s Brazilian border, killing two and wounding a dozen in a confrontation that could signal a more violent and destabilizing struggle over who can claim to be the country’s legitimate leader. A critical moment loomed on Saturday, when Venezuela’s opposition, led by Juan Guaidó, vowed to deliver tons of donated humanitarian aid from abroad, against the orders of President Nicolás Maduro. The protesters killed on Friday, members of the Pemón indigenous group, opposed Mr. Maduro’s decision, saying the population needs the food and medication. They were shot after closing a road to prevent security forces from passing. Outraged fellow protesters were reported to have seized a Venezuela National Guard commander and his deputies in retaliation. The bloodshed came […]