Currently Luiz Inácio Lula da Silva is Brazilian president elected by PT.
PT was have been changing from a Extreme Leftist Political Party to Leftist Political Party and, maybe, to Center-Leftist Political Party in the future.
The party accommodates different "tendencies". The largest being Articulação.
Most extreme leftists left to other parties, like PSTU.
More information in http://www.pt.org.br