President Trump’s oil blockade is grinding Cuba’s economy to a standstill, spreading unrest and intensifying pressure on the Communist regime. On Monday, the island nation’s obsolete power grid collapsed, causing blackouts across the country and exposing the magnitude of its economic implosion. WSJ’s Vera Bergengruen explains the U.S. pressure campaign and its impact. Jessica Mendoza hosts.   Further Listening: - Trump's 'Donroe Doctrine' on Foreign Policy Sign up for WSJ’s free What’s News newsletter. Learn more about your ad choices. Visit megaphone.fm/adchoices