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FILE PHOTO: Brazil's former President Luiz Inacio Lula da Silva's supporters walk during the Free Lula March in Brasilia, Brazil, August 14, 2018. REUTERS/Adriano Machado/File photo(reuters_tickers)
By Anthony Boadle
BRASILIA (Reuters) - Jailed former president Luiz Inacio Lula da Silva has increased his support by 5 percentage points and would win Brazil's October presidential election if he was allowed to run, a poll by CNT/MDA showed on Monday.
The survey, which was last taken in May, found that almost half of the leftist leader's supporters would transfer their votes to his running mate Fernando Haddad if Lula is disqualified from Brazil's most uncertain race in decades.
The Brazilian real led losses among Latin American currencies after the poll showed investors' favourite Geraldo Alckmin, the candidate most likely to enact fiscal reforms, lagging far behind his rivals.
Electoral authorities are expected to bar Lula from the election due to a corruption conviction. Despite that, he took 37.3 percent of voter intentions in the latest poll, up from 32.4 percent in the same poll in May.
His nearest rival was far-right candidate Jair Bolsonaro with 18.3 percent, followed by environmentalist Marina Silva with 5.6 percent and business-friendly Alckmin with 4.9 percent.
Support for Marina Silva and centre-left candidate Ciro Gomes has slipped since the May poll, while support increased for Bolsonaro. Alckmin, a former governor of Sao Paulo state, has also gained ground marginally.
It was the first major poll since candidacies were officially registered last week, but it did not provide results for the likely scenario of a race without Lula.
Lula's supporters were asked who they would back if he is out of the race and 17.3 percent of the people surveyed said they would cast their vote for Haddad, a former Sao Paulo mayor who would head the Workers Party ticket.
Another 11.9 percent of the voters surveyed would migrate to Marina Silva, 9.6 percent to Gomes, 6.2 percent to Bolsonaro and 3.7 percent to Alckmin.
Lula, Brazil's first working class president and whose social policies lifted millions from poverty in Latin America's largest nation, was jailed in April to start serving a 12-year sentence for receiving bribes.
The nationwide survey of 2,002 people was carried out by pollster MDA for the transportation sector lobby CNT between Aug. 15-18 and has a margin of error of 2.2 percentage points.
(Reporting by Anthony Boadle; Editing by Marguerita Choy and James Dalgleish)