In Buenos Aires Province and the city of Buenos Aires, the main intra-party division of the PJ was between the center-right, traditional Peronist faction led by Hilda González de Duhalde (wife of former governor and interim president Eduardo Duhalde), and the more center-left "heterodox" faction with candidates that answer to President Néstor Kirchner.

Kirchner took a prominent role in the campaign for "his" candidates of the Front for Victory (Frente para la Victoria, FV) in most provinces, explicitly stating that these elections were a referendum on his administration.

Kirchner also campaigned against former President Carlos Menem, a leading conservative Peronist, in La Rioja Province, where the latter was ultimately elected to the Senate for the third (minority party) seat.

Buoyed by a strong recovery in the Argentine economy, candidates endorsed by Kirchner (mainly on the Front for Victory ticket) obtained an overwhelming triumph.

Only the three most voted in this list have an established national structure; Recrear and the ARI are relatively recent offshoots of the UCR (to the right- and left-wing side of the political spectrum, respectively), and the Socialist Party's five deputies all belong to the province of Santa Fe, the only district where the PS is strong.