SAO PAULO (AP) — Former Brazilian President Luiz Inacio Lula da Silva may be in jail, but he features in his party's first ad ahead of October's presidential election. And a new poll indicates he's still leading the race — even if electoral courts are likely to bar him from running.

Da Silva focuses on the economy in the video released on the internet Wednesday. He doesn't mention the corruption conviction that put him in jail in April.

Vice presidential candidate Fernando Haddad also appears in the video, which celebrate Da Silva's registration as a formal candidate last week.

Haddad's expected to take over the presidential candidacy if da Silva is barred.

A new poll by Datafolha released Wednesday shows da Silva still holds a double-digit advantage over his closest rivals.