A strong economy and a vigorous social policy helped make 1920 a banner year for President Hipólito Yrigoyen, whose UCR won 61 of the 102 seats at stake in the Lower House of Congress.

[1] The party effectively displaced both the Socialist and Democratic Progressive parties in the highly competitive Buenos Aires district by supporting labor rights and advancing programs such as the National Inexpensive Housing Commission (CNCB), which added thousands of units to the capital's perennially strained housing supply.

[2] The addition of 38 seats to the Chamber of Deputies, partly as a result of the 1914 Census, further enhanced the UCR's sweep, and for the first time, gave them an absolute majority in the Lower House.

Socialists made modest gains in Congress, and won control of local governments in Zárate and Mar del Plata (the first in Argentina).

The most prominent such faction, that was led by Santa Fe Governor Rodolfo Lehmann and 8 Congressmen at its height, was weakened by his resignation at the end of 1919, and presented no candidates in 1920.