MIAMI - President-elect Donald Trump issued a stern warning to Venezuelan President Nicolás Maduro on Thursday after the brief detention of prominent opposition leader María Corina Machado, who had been leading massive protests against Maduro's government. On Truth Social, Trump called on Maduro to ensure the safety of opposition leaders, writing: "Venezuelan democracy activist María Corina Machado and President-elect González are peacefully expressing the voices and the WILL of the Venezuelan people with hundreds of thousands of people demonstrating against the regime. The great Venezuelan American community in the United States overwhelmingly support a free Venezuela and strongly supported me....