SAO PAULO, May 22 (Reuters) - Brazilian President Luiz Inacio Lula da Silva leads opposition Senator Flavio Bolsonaro in the race for this year's presidential election, gaining ground after reports linking the right-wing challenger to a disgraced banker, a poll released by pollster Datafolha showed on Friday.
Leftist Lula would win a potential second-round runoff against Flavio by 47% to 43%, the poll showed. A May 16 survey had them tied.
(Reporting by Isabel Teles, Editing by Iñigo Alexander)
