MEXICO CITY — Hundreds of thousands of people marched in Mexico’s capital Sunday in a show of support for President Andrés Manuel López Obrador, who before assuming the presidency had led some of the country’s biggest protests. The “people’s march” marked four years in office for the leftist leader and was a response to a large opposition march two weeks ago to protest López Obrador’s proposal to reform the country’s electoral authority. Read More (from 2018): Mexicans Celebrate Lopez Obrador’s Left-Wing Landslide The president himself led Sunday’s march through central Mexico City, which was accompanied by mariachi music, singing and a festive atmosphere.