Leftist parties in São Paulo have started discussions regarding potential candidates for the alternate seat in the Senate, anticipating a possible candidacy from the current Minister of Finance, Fernando Haddad. The reasoning behind this interest stems from the likelihood that Haddad would continue as a minister under President Lula should Lula win re-election, prompting various parties to position themselves favorably for his potential vacancy.

Parties such as PSB and PSOL are actively seeking this alternate position, but the Workers' Party (PT) is also showing interest to secure the seat in case Haddad decides not to assume a Senate mandate. Haddad has been hesitant to give in to the pressures from the PT and Lula regarding a Senate candidacy, indicating a preference to focus on overseeing the presidential campaign instead.

Another possibility that has emerged is Haddad potentially running for governor in the upcoming elections in October. This scenario highlights the strategic maneuvering among leftist parties in São Paulo, as they prepare for the political landscape that would emerge following the elections and the President's potential re-election campaign.