Cuba's oil crisis triggers blackouts and protests as the CIA director visits Havana for tense negotiations; Louisiana Republicans vote today on Senator Bill Cassidy, a Trump critic facing primary challengers; World Cup travel restrictions are deterring international fans from attending matches in the U.S. this summer. Cuba has exhausted its 100,000-ton Russian crude oil supply and operates without energy reserves, creating sustained blackouts that exploit an aging grid incapable of handling solar voltage fluctuations.