SAO PAULO, June 16 (Reuters) - Brazil's President Luiz Inacio Lula da Silva extended an advantage over Senator Flavio Bolsonaro in a potential runoff in the October general elections, a CNT/MDA poll showed on Tuesday.
Lula would receive 49.3% of the votes in a runoff, compared with 36.8% for Flavio Bolsonaro, son of former President Jair Bolsonaro, according to the poll.
In an April survey, Lula was seen with 44.9% of the votes, and Flavio Bolsonaro with 40.2% .
CNT/MDA interviewed 2,002 people from June 10-14 in 143 Brazilian municipalities. The survey's margin of error is of 2.2 percentage points in either direction.
(Reporting by Isabel Teles and Eduardo Simoes)
