From a distance, Margarita Island looks like a Caribbean escape. Palm-lined beaches, duty-free shops, and resort towns sell the image of a tropical playground just off Venezuela’s northeastern coast. But U.S. officials say the Venezuelan outpost has become something else entirely: Hezbollah’s most important base of operations in the Western Hemisphere, strengthened by Iran’s growing footprint and the Maduro regime’s protection. That threat, U.S. officials warn, reflects a broader security challenge emerging from the region....










