I understand that the link has the word "corruption" in it, but it's worth actually reading. Election authorities in Brazil banned Bolsonaro from referring to Lula as "corrupt" or a "thief," and fined him. Normally we don't refer to people who had their convictions annulled (and recorded conspiracies by administrations against them widely shared) as corrupt.
> On 23 March 2021, the Supreme Federal Court ruled by a 3–2 decision that Moro, who had overseen Lula's trial in a case, was biased against him.[23] It upheld the ruling on 23 June by a 7–4 decision.[105] Judge Gilmar Mendes of the Supreme Federal Court on 24 June annulled the two other cases Moro had brought against Lula, reasoning that there was a link between them and the case in which Moro was declared biased. This meant that all evidence Moro had collected against Lula is inadmissible in court and fresh trials would be needed.
> On 9 June 2019, The Intercept published leaked Telegram messages between the judge in Lula's case, Sérgio Moro, and the Operation Car Wash lead prosecutor, Deltan Dallagnol, in which they allegedly conspired to convict Lula to prevent his candidacy for the 2018 presidential election.[113][114] [115][116][117][118][119] Moro was accused of lacking impartiality in Lula's trial.[120] Following the disclosures, the resumption of legal proceedings was determined by the Supreme Court.[121] Moro denied any wrongdoing or judicial misconduct during the course of Operation Car Wash and his investigation of the former president, claiming that the conversations leaked by The Intercept were misrepresented by the press and that conversations between prosecutors and judges are normal.[122] Moro became Minister of Justice and Public Security after the election of president Jair Bolsonaro, and it is disputed whether an agreement was in place prior to Bolsonaro's election.
> The information published by The Intercept prompted reactions both in Brazil and overseas. A group of seventeen lawyers, ministers of Justice, and high court members from eight countries reacted to the leaks by describing former President Lula as a political prisoner and calling for his release.[123] United States Senator Bernie Sanders said Lula should be released and his conviction annulled. Ro Khanna asked the Trump administration to investigate Lula's case, saying that "Moro was a bad actor and part of a larger conspiracy to send Lula to jail".[124] American political commentator Michael Brooks, a vocal advocate for the former president, stated that Lula's imprisonment and Moro's alleged political motives had rendered the results of the 2018 election "fundamentally illegitimate."[125]
> Judge Edson Fachin of the Supreme Federal Court annulled all convictions against Lula on 8 March 2021, ruling that the court in Curitiba which convicted him lacked jurisdiction to do so, and ordered a retrial in Brasilia.[130] A full Supreme Court bench later upheld the ruling by an 8–3 decision on 15 April.