Cristina Fernández de Kirchner of the Buenos Aires province, both leaders had their respective wives run for the office: Hilda González de Duhalde for the PJ, and Cristina Kirchner for the Front for Victory. Cristina Kirchner won the election. The presidential election was held on 28 October 2007. With Kirchner leading all the pre-election polls by a wide margin, her challengers focused on forcing her into a ballotage. To win in a single round, a presidential candidate in Argentina needs either more than 45% of the vote, or 40% of the vote and a lead of more than 10 percentage points over the runner-up.
Cristina Fernández de Kirchner ended his term of office in 1999 and was replaced by Fernando de la Rúa. Kirchner took part in a commission to investigate money laundering with fellow legislator Elisa Carrió, and got into conflicts with her. She ran again for senator in the 2001 midterm elections. Néstor Kirchner was elected president in 2003, and Cristina became the First Lady. Under these circumstances, she sought a lower profile in Congress. Néstor Kirchner had a political dispute with the previous president, Eduardo Duhalde. Their dispute continued during the 2005 midterm elections. Without consensus in the PJ for a single candidate for senator