to run the Ministry of Economy, which was run successively by Eugenio Folcini, Eugenio A. Blanco, Roberto Verrier and Adalberto Krieger Vasena, who pursued policies favorable to the most well-off and economically powerful sectors of society. One of most significant institutional measures taken by the military dictatorship was to send out a proclamation abolishing ipso facto, the then national constitution, known as the Constitution of 1949, and replacing it with the text from Argentina's Constitution of 1853. This measure would later be endorsed by the Constitutional Convention which was elected in 1957 without following the constitucional procedure and prohibiting the participation of the Justicialist Party. After convening under the leadership and influence of the military regime, "article 14bis" was added to the constitution. In 1958, the government of the Revolución Libertadora held a limited form of elections, overseen by the Armed Forces, in which the Peronist party was banned. The elections were won by the Intransigent Radical Civic Union (UCRI), a group from the fractured Radical Civic Union, led by Arturo Frondizi, who had established a pact with Perón in order to attract the decisive Peronist vote. President Fondizi was, in turn, overthrown by the military four years later. Coup of 29 March 1962 The military coup of March 29, 1962 was unique in that, after overthrowing Arturo Frondizi (of the Intransigent Radical Civic Union - UCRI), it was not a member of the military who took power, but rather a civilian. Frondizi endured repeated protests and military insurrections during his rule, during which even the Minister of the Economy (Álvaro Alsogaray) opposed him. These events ended in the coup of March 29, 1962, led by General Raúl Poggi. The event that led to the coup was the sweeping victory of Peronism in the elections held eleven days before and in which ten of the fourteen then-existent provinces, including the strategic Province of Buenos Aires where the textile union leader Andrés Framini won. Peronism had been banned by the government of the Revolución Libertadora but Frondizi had allowed it in the elections, although he continued to prohibit Juan Perón from returning to the country and from running as a candidate. Frondizi immediately moved to establish his power in the provinces in which Peronist parties had won, but the coup proved to be unstoppable. After the military uprising of March 29, 1962, President Frondizi, who had been arrested by the military