MEXICO CITY — As a candidate, President Andrés Manuel López Obrador of Mexico promised to remake Mexico, vowing to end corruption and impunity, attack inequality, pacify the country and disrupt a status quo that, he said, favored the few — the wealthy and powerful — and marginalized everyone else.

On Monday, in a confident speech marking his first 100 days in office, he insisted that transformation was firmly underway.

“We have already begun to write the prologue of the great work of national transformation,” he declared. “We will continue to build, among everyone, the beautiful utopia. We are going to continue walking toward that great ideal of living in a new, free, fair, democratic and fraternal homeland.”

Most Mexicans seem to agree, giving their folksy, man-of-the-people president stratospheric approval ratings. Some recent surveys put his support above 80 percent.