There they were, two of the gray-haired confidants of Hugo Chávez , Venezuela ’s late leftist leader, voicing their indignation at the government bumbling that led to Sunday’s stinging electoral defeat of his United Socialist Party. “We are facing a disaster,” said Héctor Navarro, a former cabinet minister. “This is not the time to act like an ostrich.” But in the middle of the news conference on Wednesday, with dozens of journalists jammed into a dingy meeting room in a downtown hotel, a shrill siren wailed and in burst a band of agitators, some in the red shirts of Mr. Chávez’s die-hard supporters. “You are traitors to the revolution!” shouted one man. “Rats! You are sewer rats!” shrilled another. And they […]