A.M. Edition for May 5. Warren Buffett marks the calendar for his departure from Berkshire Hathaway, announcing his handpicked successor will take the reins next year. Plus, the ‘Trump factor’ propels another left-leaning leader to a surprise election victory, this time in Australia. And WSJ South America bureau chief Juan Forero explains how production advances and long-distance smuggling vessels are transforming the global cocaine trade. Luke Vargas hosts.

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