The U.S. government has applied sanctions against eight more Venezuelan officials as it attempts to increase pressure to reverse recent political changes. It is also trying to involve other countries, but has so far hung back from applying sanctions against Venezuelan oil exports. That may be because of concerns about the impact on Venezuela’s food imports. It could also reflect the potential ineffectiveness of such a move. U.S. imports of oil from Venezuela fell 12% in June on a year earlier to their lowest since October. Yet, exports to China climbed 13% on a year earlier. As a result ...