Ms. Machado galvanized a movement that independent analysts say won last year’s election, only to have it stolen by President Nicolás Maduro.

© Adriana Loureiro Fernandez for The New York Times

And a reminder of the need to depose the regime of Nicolás Maduro.

© Adriana Loureiro Fernandez for The New York Times

And a reminder of the need to depose the regime of Nicolás Maduro.

Ms. Machado built one of Venezuela’s most important political movements, and lives in hiding from President Nicolás Maduro’s authoritarian government.

© Adriana Loureiro Fernandez for The New York Times

Spurned by the country’s authoritarian president and even her own colleagues in the opposition, María Corina Machado has built the most significant voter mobilization since Hugo Chávez.