Mr Bolsonaro told his audience that he was their only option to end the corruption, crime and economic stagnation gripping Brazil. His rhetoric has shown stark parallels with U.S. President Donald Trump.
Mr Bolsonaro said "polling problems" during Sunday's election cheated him of outright victory.
With a sputtering economy and corruption in the ranks of government, crime has become one of the biggest issues in the campaign. "Haddad is a smart guy, and I'm sure he's thinking to himself, 'I should do this and do that, ' but he's constrained - his party is trying to think how it survives and the longer it takes them, the more space it gives the Bolsonaro camp". The country is just going to divide even more.
Fernando Haddad, from the leftist Workers' Party (Partido dos Trabalhadores: PT), came second with 29%, setting the stage for a runoff on 28 October 2018. He has promised to fight long-standing inequalities, scrap a major labour reform passed past year and invest more in education. A once wildly popular figure who led millions of Brazilians out of poverty, Lula is now in jail on corruption charges and was barred from running. The next leader will also have an influence on Venezuela, both diplomatically and practically, as thousands of Venezuelans have crossed Brazil's northern border.
Bolsonaro has painted a nation in collapse, where drug traffickers and politicians steal with equal impunity, and moral rot has set in.
Davante Adams returning to practice, Randall Cobb ruled out vs. Lions
He was expected to match up with Adams, but if the Pack is without their number one wideout, Detroit will gain a big advantage. Rookie running back Kerryon Johnson has 12 carries for 70 yards, but left in the fourth quarter with an ankle injury.
"Bolsonaro has been so successful because he was the first to realize that this would be a 'change election, ' and he has systematically adopted an anti-system rhetoric, allowing him to mobilize people who wanted a more radical change", Prof. Workers' Party stalwarts are still fuming about the 2016 impeachment and removal from office of President Dilma Rousseff, da Silva's predecessor.
Brazil's next Congress was also elected on Sunday, and in a seismic shift, Bolsonaro's once-tiny Social Liberal Party (PSL) was poised to become the second-largest force in the body. "Bolsonaro will hit back on that".
"This vote was a real and clear rejection to everything that was symbolized by the left parties and by Lula", said Thiago de Oliveira, a Brazilian political risks expert at ARKO to ABC News, referring to Lula da Silva, a left-wing politician who was president from 2003 to 2011.
Still, he alienated almost as many people as he attracted with his offensive comments. Aires is one of 53 transgender candidates running for state and federal offices in Brazil, a deeply conservative and religious country that is also one of the most risky in the world for transsexuals.
"We expected to win in the first round", 77-year-old retiree Lourdes Azevedo said in Rio de Janeiro. The Workers' Party took to Twitter on Monday with a rallying cry to all those who believe in democracy and vowed to unify the country.
Bolsonaro, an outspoken apologist for Brazil's 1964-1985 military dictatorship, came up short of a majority needed to avoid the runoff. Signs that Bolsonaro could win enough support in Congress to push through his agenda added to enthusiasm.
"We have flirted too much with the left over the past 20 years".