Lorenzoni was elected State Deputy of Rio Grande do Sul in 1994 for the Liberal Party . In 2003, now in the Liberal Front Party, he was elected Federal Deputy, being one of the strongest opponents of the government of president Luís Inácio Lula da Silva and the Workers' Party. During his terms in the Chamber of Deputies, Lorenzoni was a member of the Mixed Inquiry Parliamentary Committee, investigating Correios, Cachoeira, and Petrobras. On 2016, Lorenzoni voted for the impeachment of then president Dilma Rousseff. During the government of Michel Temer, Lorenzoni supported the Constitutional Amendment nº.95 and Labor Reform. On August and September 2017, the Deputy voted against the reports that rejected two complaints made by the then Prosecutor General Rodrigo Janot against president Temer. In 14 March 2017, Prosecutor General Rodrigo Janot sent to the Supreme Federal Court 83 inquiries based in pleas made by 78 executives of Odebrecht, being mentioned in Odebrecht testimonies. In June 2018, Supreme Court JusticeLuiz Fux rejected the inquiry: "The steps taken were not enough to elucidate the materiality of the alleged crime". To the RBS TV, Lorenzoni assumed the irregularity, claiming that he "couldn't" declare the money to the Electoral Justice, and that the cipher would be less than the R$200,000 cited by Ricardo Saud. Lorenzoni is a member of the Evangelical Lutheran Church of Brazil.
Positions
Anti-corruption measures
In 2016, Lorenzoni was part of the committee that turned the ten anti-corruption measures proposed by the Federal Public Prosecutor's Office into law. During the process of discussion, four versions of the report were presented. The first report Lorenzoni presented on 9 November criminalised "caixa 2" and proposed integrity tests for public agents with solely administrative consequences, while the original text had proposed criminal and civil lawsuits. The second report, presented on 21 November, typified the crime of "caixa 2", with sentences of two to five years for people who use non-declared resources in electoral campaigns. These changes were seen as a way for politicians who used "caixa 2" before the change in law to seek amnesty, although the report had not proposed the amnesty directly. Also, vote selling was typified as crime. This version had 17 measures. Lorenzoni's third report on 22 November decreased the number of measures from 17 to 12, removing those that mentioned popular lawsuits and international cooperation pleas. The fourth report, with 20 changes from the previous one, was presented on 23 November. Among the changes there were: raising the minimum amount required for active and passive corruption to be considered a major crime from 100 to 10,000 minimum wage equivalents ; removal of the time to set up investigations and finish denounces; prosecuting those who practice it in the name of a candidate. The Committee unanimously approved this version the same day, with 30 votes in favour.
Prison in second instance
In October 2016, Lorenzoni supported the decision of the Supreme Federal Court of allowing the prison of defendants convicted in second instance, and said the will include it among the anti-corruptions measures. "What are we gonna do? We're gonna bring this decision of the Supreme Federal Court and put in the final report. In other words, from now on, there is a decision of the Supreme Court and in a few months there will be, in the Brazilian Code of Penal Procedure, the same decision confirmed in a law by the Brazilian parliament", he said.
In November 2016, in an interview in the Brazilian TV showRoda Viva, Deputy Lorenzoni reaffirmed his opposition to legal immunity. "There is, in the country, a feeling of impunity. I hope the Congress take this moment to make a conciliation with the streets. The parliamentaries need to have capacity and humility to listen to the voice of the streets".
