Carolina Valladares Pérez, a Washington-based correspondent for the government-funded international news service Voice of America, has reported from places where press freedom is severely restricted – war zones and autocratic states – in the Middle East and across Latin America. Intimidation and threats from state officials were not unusual – but she always managed to get the story out. Now for the first time in her career, Valladares Pérez says she has been silenced – not by a faraway regime, but by the government of the United States. “Nicolás Maduro did not close our bureau,” she said, of Venezuela’s authoritarian...