President Donald Trump’s political influence is reaching far beyond America’s borders as several Latin American countries shift toward right-leaning leadership, though that momentum hit a roadblock Sunday when Brazilian President Luiz Inácio Lula da Silva defeated conservative challenger Flávio Bolsonaro in the country’s presidential runoff. For Argentina-born Trump rally attendee Marcelo Sandrin, who has lived in the U.S. for roughly three decades, the shift is unmistakable — and...