Presidency of Cristina Fernández de Kirchner and became president after his death. The transition from Néstor Kirchner to Cristina Kirchner was also the first time when a democratic head of state was replaced by his spouse, without involving the death of any of them. Néstor Kirchner stayed active in politics despite not being the president, and worked alongside Cristina Kirchner. The press developed the term ""presidential marriage"" to make reference to both of them at once. Some political analysts compared this type of government with a diarchy. During the first days of Fernández's presidency, Argentina's relations with the United States deteriorated as a result of allegations
Cristina Fernández de Kirchner singing the Argentine national anthem. The city police estimated that the demonstration was attended by 400,000 people. Several scandals took place during the Kirchner administration. The first involved the detention of Venezuelan-American businessman Antonini Wilson in an airport after being found with a suitcase filled with $800,000. This money was illegally provided by Petróleos de Venezuela, the state oil company, to be used for Kirchner's 2007 general election campaign. Details of the case were explained by businessman Carlos Kauffmann and lawyer Moisés Maiónica, who pleaded guilty. The FPV financing of the 2007 elections caused another scandal years later. Three pharmaceutical