Chávez Successor an Ex-Bus Driver, Peripatetic, Hindu-Mystic Devotee By KEJAL VYAS And JOSÉ DE CÓRDOBA CARACAS—Nicolas Maduro has gone from driving a bus to becoming ailing President Hugo Chávez's handpicked choice to continue his vision of socialism and possibly lead Venezuela, an oil-rich republic of 29 million. Mr. Chávez, who said this past weekend he has suffered another relapse in his long battle with cancer, named Mr. Maduro as his successor. It was the first time Mr. Chávez talked publicly about who might replace him, prompting many analysts to speculate that the former army tank commander believes himself to be...