[6] Polling in July 2005 by the firm Consulta Mitofsky found that First Lady of Mexico Marta Sahagún, the wife of president Vicente Fox, was the most popular potential PAN candidate.

In August 2005, polling conducted by Reforma found Josefina Vázquez Mota, the Secretary of Social Development, to be the most popular PAN candidate.

Polling company Parametría found that Senator Demetrio Sodi led the field of potential PAN candidates among party members and the general electorate.

[9] Polling conducted in 2005 found that Beatriz Paredes, the former Governor of Tlaxcala and President of the Chamber of Deputies, was the most popular potential PRI candidate among both party members and the general electorate.

In the sixteen borough mayoral races, the PRD-led alliance was victorious in fourteen (the thirteen it already held, plus Milpa Alta gained from the PRI), with the PAN retaining the two (Benito Juárez, D.F.

The additional 26 deputies assigned on the basis of proportional representation in accordance with the parties' total vote numbers were distributed as follows: PAN, 12; PRI, 4; PVEM, 4; Nueva Alianza, 4; and Alternativa, 2.