 So far this year, the Maduro regime has arrested more than 100 opposition activists. It has also banned Machado from running for president. So she is campaigning on behalf of her stand-in candidate, Edmundo Gonzalez, who, according to polls, would beat Maduro in a free election. But after today's arrest, Machado said, I'm warning the world about Maduro's escalation of repression. For NPR News, I'm John Otis.