An economic crisis and political infighting among the country’s long-dominant socialist party could pave the way for the first right-wing president in decades.

© Marian Carrasquero for The New York Times

Despite being barred from running again for president and being sought for arrest, a towering figure of Bolivian politics is trying to rally supporters to cast null votes.

© Marian Carrasquero for The New York Times

Mr. Uribe, a presidential hopeful, was shot in June at a campaign rally in Bogotá in an attack that shocked the nation.

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Mr. Uribe, a towering figure in Colombian politics, was accused of trying to bribe a former paramilitary to retract testimony damaging to him.

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