BRASILIA, Brazil (AP) — Brazil’s President-elect Luiz Inácio Lula da Silva will be sworn in Sunday in the capital, Brasilia, and assume office for the third time, marking the culmination of a political comeback sure to thrill supporters and enrage opponents in a fiercely polarised nation.

Early Sunday afternoon, the party was already on. People wearing the red of Lula’s Workers’ Party flooded into the main esplanade to hear live music and await the start of official events. They chanted Lula’s name and belted out the lyrics of a song that informs outgoing President Jair Bolsonaro it is time for him to leave.

Lula’s presidency is unlikely to be like his previous two mandates, coming after the tightest presidential race in more than three decades in Brazil and resistance to his taking office by some of his opponents, political analysts say.

The leftist defeated far-right Bolsonaro in the October 30 vote by less than two percentage points. For months, Bolsonaro had sown doubts about the reliability of Brazil’s electronic vote and his loyal supporters were loath to accept the loss.

Many have gathered outside military barracks since, questioning results and pleading with the armed forces to prevent Lula from taking office.

His most die-hard backers resorted to what some authorities and incoming members of Lula’s administration labeled acts of “terrorism” – something the country had not seen since the early 1980s, and which have prompted growing security concerns about inauguration day events.

“In 2003, the ceremony was very beautiful. There wasn’t this bad, heavy climate,” said Carlos Melo, a political science professor at Insper University in Sao Paulo, referring to the year Lula first took office. “Today, it’s a climate of terror.”

Tanya Albuquerque, a student, flew from Sao Paulo to Brasilia and had tears in her eyes as she heard local leftists celebrating incoming visitors at Brasilia’s airport on Saturday. She decided to attend after seeing pictures of Lula’s first inauguration.

“Maybe we won’t have 300,000 people tomorrow like then; these are different and more divisive times. But I knew I wouldn’t be happy in front of a TV,” Albuquerque, 23, said on Saturday.

Lula has made it his mission to heal the divided nation. But he will have to do so while navigating more challenging economic conditions than he enjoyed in his first two terms, when the global commodities boom proved a windfall for Brazil.

At the time, his administration’s flagship welfare program helped lift tens of millions of impoverished people into the middle class. Many Brazilians travelled abroad for the first time. He left office with a personal approval rating of 83 per cent.

In the intervening years, Brazil’s economy plunged into two deep recessions — first, during the tenure of his handpicked successor, and then during the pandemic — and ordinary Brazilians suffered greatly.

Lula has said his priorities are fighting poverty, and investing in education and health. He has also said he will bring illegal deforestation of the Amazon to a halt. He sought support from political moderates to form a broad front and defeat Bolsonaro, then tapped some of them to serve in his Cabinet.

Given the nation’s political fault lines, however, it is highly unlikely Lula ever re-attains the popularity he once enjoyed, or even sees his approval rating rise above 50 per cent, said Maurício Santoro, a political science professor at Rio de Janeiro’s State University.

Furthermore, Santoro said, the credibility of Lula and his Workers’ Party were assailed by a sprawling corruption investigation. Party officials were jailed, including Lula — until his convictions were annulled on procedural grounds. The Supreme Court then ruled that the judge presiding over the case had colluded with prosecutors to secure a conviction.

Lula and his supporters have maintained he was railroaded. Others were willing to look past possible malfeasance as a means to unseat Bolsonaro and bring the nation back together.

But Bolsonaro’s backers refuse to accept someone they view as a criminal returning to the highest office. And with tensions running hot, a series of events has prompted fear that violence could erupt on inauguration day.