[2] The Socialists, who vied for the majority in the Buenos Aires City Legislature (but had little following elsewhere), themselves balked at the possibility of victory in 1928 and split during their 1927 convention over Senator Juan B. Justo's intransigent leadership of the party.

Mendoza Province, which remained in the reformist former Governor Carlos Washington Lencinas' Dissident UCR column, continued to be denied its two senators by the body, itself.

[4] Bravo's Authentic Socialists lost to Matienzo's splinter ticket (though only an endorsement by San Juan Governor Federico Cantoni gave the latter 3 electoral votes).

[3] Roca's Unified Front, which lost in their home province of Córdoba, had endorsed the Antipersonalist UCR Melo-Gallo ticket, and pledged their 20 electors to the latter in a symbolic alliance.

Yrigoyen's running mate, Francisco Beiró, died before taking office, and Córdoba Governor Enrique Martínez was elected to the post by the electoral college.