Datafolha: Lula has 42% in the 1st round, against 38% for Flávio Bolsonaro
2,506 voters were interviewed between September 28 and October 1

TL;DR
- Lula (PT) leads with 42% in the first round, up from 40%.
- Flávio Bolsonaro (PL) is second with 38%, up from 36%.
- Five second-round scenarios were tested, with Lula leading in all.
- In valid votes, Lula has 45% and Flávio Bolsonaro has 40%.
- The poll surveyed 2,506 voters between September 28 and October 1, with a 2% margin of error.