Andres Manuel Lopez Obrador took the oath of office Saturday as Mexico's first leftist president in over 70 years, marking a turning point in one of the world's most radical experiments in opening markets and privatization.
Lopez Obrador pledged "a peaceful and orderly transition, but one that is deep and radical."
Mexico long had a closed, state-dominated economy, but since entering the General Agreement on Trade and Tariffs in 1986, it has signed more free trade agreements than almost any other country, and privatized almost every corner of the economy except oil and electricity.
Now, though, Lopez Obrador talks a talk not heard in Mexico since the 1960s: He wants to build more state-owned oil refineries and encourages Mexicans to "not to buy abroad, but to produce in Mexico what we consume."
Combined with a deep sense of nationalism and his own place in history, Lopez Obrador's inauguration is likely to be the most home-grown, populist handover of power in decades.
As to underscore the transition, British Labour Party leaders Jeremy Corbyn showed up for inauguration after visiting Lopez Obrador a day earlier at his house in southern Mexico.
A party statement said Lopez Obrador "faces huge challenges in his mission of transforming Mexico, but Jeremy hopes his election will offer Mexico's poor and powerless a real voice and a break with the failures and injustices of the past."
"At a time when the fake populists of the far right are gaining ground internationally — including in Latin America," the statement continued, Lopez Obrador "has shown that a progressive agenda for change can win power and take on the status quo."
After taking the official oath of office at the Chamber of Deputies, Lopez Obrador plans to hold another ceremony later in the day on Mexico City's main square, where a leader of Mexico's indigenous communities will bestow a traditional symbol of authority — a ceremonial wooden staff known as a "baston." A grand celebration featuring traditional music will be held in the square.
The country's 65-year-old new leader is moving the presidential office fully back to the centuries-old National Palace that lines one side of the square, while refusing to live at the luxurious, heavily guard presidential residence 6 miles (9 kilometers) to the west. He will reside instead at his private home.
Closed to the public since the first parts were built in the 1930s, the compound will now be used for public events and it was thrown open to the public on Saturday.
Gabriela Barrientos, 71, a retired secretary and Jesus Basilio, a market vendor, 55, were among the first to line up at the gate to enter what Basilio called "the house of the people, an emblematic place we will be able to enter for the first time."
Yaneth Fierro, 42, a housewife from Acapulco, expressed amazement at the luxury of the compound — there was a small cinema in the basement of one building — but disappointment at completely emptied rooms. "We wanted to see the furniture, but the "Gaviota" (the nickname of former first lady Angelica Rivera) took them all."
la casa ya es mucho y queríamos ver los muebles pero la Gaviota se lo llevó todo"
The handover of power began at midnight when new cabinet secretaries were sworn in for key security posts — a tradition meant to ensure there's always someone at the helm of the Army, Navy and Interior Department, the country's top domestic security agency.
New Interior Secretary Olga Sanchez Cordero said in a post-midnight ceremony that the new government will "listen to everybody, the majority and the minorities, because in a democracy all opinions can be expressed."
Lopez Obrador gained prominence as a leftist politician leading protests against oil pollution in his swampy native state of Tabasco, though he hasn't given any indication that he will cancel private oil exploration contracts or pull out of Mexico's free trade agreements with 44 countries.
Still, it is clear that the first big change in direction from three decades of "neoliberal" policies of free markets and small government will occur in his six-year term.
"We've had enough neoliberalism. Do we have to applaud it?" Lopez Obrador said in September. "Why don't they accept that neoliberal policies were a failure, that they only benefited a small minority, impoverished the majority of people, and caused violence?"
Lopez Obrador won a crushing victory in the July 1 elections after two previous, unsuccessful runs for the presidency and he is the country's first president since the Mexican Revolution to rise to prominence as a protest leader. He sees his inauguration as a historic "fourth transformation" of Mexico, following independence from Spain, the liberal reforms that broke the church's dominance in the 1850s and the 1910-1917 revolution.
His predecessor, Enrique Pena Nieto, leaves office with a historically low approval rating, which in several polls ranged from 20 percent to 24 percent. Pena Nieto failed to rein in Mexico's rising homicide rate or deal with thousands of Central American migrants camped out on the border, leaving both intractable issues as the biggest immediate challenges facing Lopez Obrador.