Axel Kicillof headed by Hernán Lorenzino. After that, on November 18, 2013, Kicillof officially became Minister of Economy. Kicillof was instrumental in the renationalization of YPF. President Cristina Fernández de Kirchner named Kicillof to the post of Secretary (or Deputy Minister) for Economic Policy and Development Planning in December 2011. He took academic leave to assume this post. In this position, Kicillof oversaw the controversial 2012 nationalization of YPF, the Argentine oil company then controlled by the Spanish energy firm Repsol. It was the largest expropriation in Argentina's history. He justified this action as part of a needed reversal of the Argentinian
Cristina Fernández de Kirchner with Iran for a joint investigation. Nisman accused the president of signing that memorandum for oil and trade benefits, according to hundreds of hours of wiretaps. On 19 January 2015, he was found dead at his home, a day before a congressional hearing to explain his accusation, which caused a great controversy. As of 2016, both the cases of the AMIA bombing and the death of Nisman remain unresolved, and the courts declined at the time to investigate his denunciation of Kirchner. Mauricio Macri, mayor of Buenos Aires, was elected president in the 2015 presidential elections, defeating the Kirchnerite candidate