Candidates kicked off their last day of campaigning Saturday for Brazil's most polarized presidential race in decades.

The front-runner: Jair Bolsonaro.

A firebrand far-right candidate fortified by a new opinion poll showing he has widened his lead over his closest rival: Fernando Haddad of the Workers Party.

Haddad replaced the Worker's Party's jailed leader, Luiz Inacio Lula da Silva, known simply as Lula.

But the Worker's Party has been challenged.

Its candidate, Haddad, is seen by critics as Lula's puppet who will release him from jail as soon as he's elected.

The 55-year-old law professor has vowed not to do that .

But he has promised to 'Make Brazil happy again' playing to the nostalgia of working-class Brazilians who greatly benefited under Lula.

While that message has connected with poorer voters, Haddad's chances look bleak.

The latest poll suggesting Bolsonaro could possibly win a majority of votes Sunday and avoid a run-off.

Bolsonaro, who suffered a near-fatal stabbing at a rally a month ago, is riding high on widespread anger over rising crime and an economy in crisis.

Brazilian markets have rallied on the prospect of Bolsonaro stopping the return of the Worker's Party, which investors blame for plunging latin america's largest economy into its worst recession.