The Trump administration has ordered the U.S. military to enforce a two-month "quarantine" of Venezuelan oil, signaling an intensification of gunboat diplomacy aimed at fostering regime instability in Caracas, with potential spillover effects that could ripple across the Caribbean into Cuba. "While military options still exist, the focus is to first use economic pressure by enforcing sanctions to reach the outcome the White House is looking (for)," a U.S. official told Reuters on Wednesday afternoon, speaking on condition of anonymity. The U.S.…