SAO PAULO, July 15 (Reuters) - Brazilian President Luiz Inacio Lula da Silva has widened his lead over right-wing Senator Flavio Bolsonaro in the run-up to October's presidential election, a Quaest poll commissioned by brokerage Genial showed on Wednesday.
Leftist Lula is seen with 45% of voting intentions in a potential second-round runoff, compared with 37% for Senator Bolsonaro, currently the main opposition hopeful.
It was the first Quaest survey following a series of political developments including a corruption investigation targeting a senior Lula ally and arguments about accountability over new U.S. tariff threats against Brazil.
(Reporting by Michael Susin and Isabel Teles; Writing by Victoria Pacheco; Editing by Andrew Heavens)