During his 2019–2023 term, Ruiz Aragón presided the parliamentary commission on Agriculture and Livestock, and formed part of the commissions on Elderly People, Energy and Fuels, Maritime Interests, Small and Medium-sized Companies, Tourism, and National Defense.[2] He was a supporter of the legalization of abortion in Argentina, voting in favour of the two Voluntary Interruption of Pregnancy bills that were debated by the Argentine Congress in 2018 and 2020.[7][8]
Ahead of the 2021 primary election, Ruiz Aragón announced his candidacy to the Corrientes Provincial Senate as part of the Justicialist Party list.[9]