Core Viewpoint - The U.S. President's decision to cut off Venezuelan oil supplies to Cuba is expected to exacerbate the existing crises on the island, which is already facing severe blackouts and shortages [1] Group 1: Impact on Cuba - Cuba is preparing for significant challenges as the U.S. aims to halt Venezuelan oil shipments, which are crucial for the island's energy needs [1] - The situation is described as a "siege scenario," indicating a severe tightening of resources that could lead to further instability [1] Group 2: Current Conditions in Cuba - The island is currently experiencing crippling blackouts and shortages, which are likely to worsen with the reduction of oil supplies from Venezuela [1]