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 president, and automatically assumed the presidency on his death. The transition from Néstor Kirchner to Cristina Fernández de Kirchner was also the first time a democratic head of state was replaced by their spouse without the death of either. He remained highly influential during his wife's term, supervising the economy and leading the PJ. Their marriage has been compared with those of Juan and Eva Perón and Bill and Hillary Clinton. Media observers suspected that Mr. Kirchner stepped down as president to circumvent the term limit, swapping roles with his wife. When Néstor Kirchner refused to run for re-election in