It was a representative organization of the traditional middle class, linked to coffee sectors, but especially the urban.
Another major defeat of the Democratic Party, which only gets 10% of São Paulo votes for Vargas.
After the October Revolution, and the disenchantment with Vargas, the PD approached the Paulista Republican Party (PRP), and is a "United Front For São Paulo Kingdom", who served in the campaign for the Constituent Assembly, and became involved with the Revolution constitutionalist 1932, having been many exiled leaders or imprisoned.
In 1933, the college was reorganized and presented joint plate with the Republican Party Paulista and the LEC - Catholic Electoral League, Commercial Association of São Paulo and the Federation of Volunteers to May 3 elections in 1933 to the National Constituent Assembly, called "Single Plate for São Paulo Kingdom", which elected 17 of the 22 deputies, with 80% of votes.
The PD elected representatives some jutting out Mr Cardoso de Melo Neto in the constituent work.