On 10 December 2019, the
Superior Electoral Court considered valid the repeal of senator Selma Arruda term, along with her substitutes, elect in 2018. The former judge was accused of omitting expenses of
R$ 1.2 million (
US$ , as of 2018) in her electoral campaign to fill one of the two seats available and represent the state of Mato Grosso in the Senate, configuring supposed
slush funds and abuse of economic power. It is necessary a bureaucratic act from the Senate Director Board to fulfill this decision. Selma Arruda could appeal to the
Supreme Federal Court, but the appeal, at first, cannot suspend the TSE decision. After the night of 12 March 2020, all the 12 candidacies were published and registered in the Regional Electoral Court of Mato Grosso. Senator Selma was officially removed from the Senate on 15 April 2020. The 3rd place of the 2018 Senate election, Cárlos Favaro (PSD), temporarily took office as Senator. The election was postponed due to the
COVID-19 pandemic in Brazil. ==Electoral process==