The Senate of Buenos Aires Province () is the upper house of the Legislature of Buenos Aires Province, the largest and most populous of Argentina's provinces. It comprises 46 members elected in eight multi-member constituencies known as Electoral Sections. The number of senators that correspond to each of the electoral sections is proportional to their population, as observed in the results of every nationwide census conducted in Argentina every 10 years. Seats may only be added to adjust the proportionality of each section, but never reduced.
As in the National Chamber of Deputies and most other provincial legislatures, elections to the Senate are held every two years, so that half of its members are up in each election. The same system is employed in the provincial Chamber of Deputies.
The Senate was established with the promulgation of the Constitution of the State of Buenos Aires, a short-lived secessionist state, in 1854. Originally located in the City of Buenos Aires, the provincial legislature was moved to La Plata following that city's establishment in 1882. The body meets in the Legislative Palace, designed by Hannover architects Gustav Heine and Georg Hagemann in 1883 and completed in 1888.
List of presidents of the Senate The Senate is chaired by the vice governor of the province, who is elected alongside the governor every four years. The Vice Governor may only cast tie-breaking votes (according to article 93 of the provincial constitution). The following is a list of vice governors of Buenos Aires since the return of democracy in 1983.
President Party Term start Term end GovernorElva RouletUCR10 December 198310 December 1987Alejandro ArmendárizLuis María MacayaPJ–FR10 December 198710 December 1991Antonio CafieroRafael RomáPJ10 December 199110 December 1999Eduardo DuhaldeFelipe SoláPJ10 December 19993 January 2002Carlos RuckaufAlejandro CorvattaPJ3 January 200210 December 2003 Felipe SoláGraciela GiannettasioPJ–FPV10 December 200310 December 2007Alberto BalestriniPJ–FPV10 December 20077 April 2010 Daniel ScioliGabriel MariottoPJ–FPV7 April 201010 December 2015Daniel SalvadorUCR–C10 December 201510 December 2019María Eugenia VidalVerónica MagarioPJ–UP10 December 2019incumbentAxel Kicillof
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