The predecessor of FIT-U was the Frente de Izquierda y los Trabajadores, Anticapitalista y Socialista, which consisted of the PTS, IS and New Movement for Socialism (NMAS).

[18] The post will be held in rotation by Alejandro López, Raúl Godoy (PTS), Angélica Lagunas (IS) and Gabriela Suppicich (PO).

)[21] On 24 July, in the town of Capitán Bermúdez in Santa Fe Province, the PO had a councillor elected, Jorgelina Signa, with 17% of the vote.

[22] On 7 August, Liliana Olivero of IS was re-elected to the Córdoba provincial legislature, this post will be rotated with Cintia Frencia (PO) and Laura Vilches (PTS).

In Buenos Aires Province their share of the vote would have entitled them to a deputy, but they fell at a second hurdle where they needed to win 3% of the number of voters on the electoral register.

In Mendoza, Argentina the list was headed by Macarena Escudero (PTS), a student, followed by Soledad Sosa and Andrés Elías (both PO).

The seats will be held by Raúl Godoy (PTS) and Patricia Jure (PO), to be followed by Angélica Lagunas (IS).

[45] In the presidential elections, two formulas competed in the primaries in August: one represented by Nicolas del Caño and Myriam Bregman (both from the PTS) against another composed of Jorge Altamira (PO) and Juan Carlos Giordano (IS — Socialist Left).

[47][circular reference] After several weeks of meetings, the Workers' Socialist Movement (MST) agreed on June 11, 2019 to join the Front for the October general election.