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 with high treason. However, as a sitting senator, she enjoyed immunity from prosecution. On 5 March 2018, Fernández was indicted for obstructing investigation into the 1994 AMIA Bombing which killed 85 people, with Fernández allegedly making a deal with the Iranian government to stop investigating Iranian officials who may be involved in the attack in exchange for better prices on Iranian oil and other products. Fernández can still face trial despite her immunity, while legislators also have the choice to strip her of immunity. Both Kirchner and her former minister Florencio Randazzo wanted to run for senator for the Buenos