Presidency of Cristina Fernández de Kirchner 10, 2007, facing challenges including inflation, union demands for higher salaries, private investment in key areas, lack of institutional credibility (exemplified by the controversy surrounding the National Institute of Statistics and Census of Argentina, INDEC), utility companies demanding authorization to raise their fees, low availability of cheap credit to the private sector, and the upcoming negotiation of the defaulted foreign debt with the Paris Club. Kirchner was the second female president of Argentina, after Isabel Martínez de Perón, but unlike Perón, Kirchner was the head of the ballot, whereas Isabel Perón was elected as vice president of Juan Domingo Perón
Cristina Fernández de Kirchner opted instead to send a bill to Congress for the renationalization of YPF, privatized in 1993, blaming the Spanish company Repsol for the energy trade deficit. The bill was approved by the Chamber of Deputies by a 207-32 margin. It was criticized as an authoritarian move, as there was no negotiation with Repsol. As well, the Vaca Muerta oil field had been discovered by this time. However, YPF was unable to afford the costs to exploit the oil at the site, and the rights to drill at Vaca Muerta were sold to the Chevron Corporation. The costs of energy imports