Otherwise patterned after Article One of the United States Constitution per legal scholar Juan Bautista Alberdi's treatise, Bases de la Constitución Argentina, the chamber was originally apportioned in one seat per 33,000 inhabitants.
Its head is the Argentine Congress composed of a Senate, integrated by representatives of the provinces and the capital; and a Chamber of Deputies, that directly represent the Argentine people.
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Subsequently she announced her departure from the party and was confirmed as the lead candidate for National Deputy for the Unión Pro Federal alliance formed by Mauricio Macri's PRO and dissident Peronists.
Vidal was fielded in the Republican Proposal (PRO) party list as a candidate for a seat in the Argentine Chamber of Deputies for Buenos Aires Province in 2005, though unsuccessfully; she was later elected to the Buenos Aires City Legislature.
Ahead of the June 2009 legislative elections, Guevara has supported the ruling Front for Victory party of President Cristina Fernández de Kirchner as a National Deputy for Buenos Aires Province, on the list headed by former President Néstor Kirchner.