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
Presidency of Cristina Fernández de Kirchner 2009 revealed an increase in their personal assets by 7 times, since Néstor Kirchner's 2003 inaugural. The increase was partly the product of land deals in El Calafate, a scenic, Santa Cruz Province town where the couple has long vacationed and own property (including of land and two hotels). On October 17, 2009, President Cristina Fernández proposed the compulsory submission of DNA samples in cases related to crimes against humanity, in a move lauded by the Grandmothers of the Plaza de Mayo, but excoriated by opposition figures as a political move against Clarín Media Group Chairperson Ernestina Herrera de Noble,