That year, free and fair elections guaranteed by the landmark Sáenz Peña Law led to the victory of numerous UCR candidates for the Argentine Congress, including Tamborini.

"[1] The election of a diplomat with anti-personalist sympathies, Marcelo Torcuato de Alvear, as president in 1922 led to a division in the UCR.

The aging Yrigoyen returned to power in 1928, deeping inter-party divisions; but his 1930 overthrow helped unify the UCR, and Tamborini joined the City Hotel Declaration of April 1931 to that effect.

[1] Seeking to thwart a UCR victory ahead of the 1931 elections, the dictator, General José Félix Uriburu jailed much of its leadership - including Alvear and Tamborini.

[3] Organizing a massive kick-off rally in front of Congress on December 8, the Democratic Union nominated Tamborini and his fellow political prisoner in 1931: former Congressman Enrique Mosca.

[4] Ambassador Braden's leak of a white paper accusing Perón of fascist ties and his addressing Democratic Union rallies in person backfired, moreover.