This survey assessed campaign influences on public opinion and voting behavior in Mexico's July 2, 2000, presidential election. The study consists of five separate surveys conducted over the course of the campaign and following the election, using a hybrid panel/ cross-sectional design. The Pre- and Post-Election Panel Data (Part 1) includes data collected from a national cross-section of 2,400 adults. All respondents were interviewed following the official start of the campaign, February 19-27, and following the election, July 7-16, while subsets of them were also interviewed April 28-May 7 and/or June 2-18. The Post-Electoral Cross-Section Data (Part 2) includes only data collected from a new and separate cross-section of 1,199 respondents, gathered to supplement the panel sample. Additional information regarding the design of the study may be found within the codebook. Respondents were queried on a wide range of issues relating to voting behavior, including exposure to media, political knowledge and engagement, opinions about salient political issues including privatization, employment, crime, the death penalty, and government services, attitudes toward the main political parties and candidates, impressions of the electoral process, voting intentions, faith in the electoral process, credibility of the media, exposure to the campaign, and opinions of current president Ernesto Zedillo and presidential candidates Cuauhtemoc Cardenas (Alliance for Mexico), Vicente Fox (Alliance for Change), and Francisco Labastida (PRI). Respondents queried following the election were asked for whom they voted and why, and whether they felt the election was clean. In addition, they were asked to assess their interest level in politics, their involvement and familiarity with the campaign media and activities, how frequently they discuss the issues, and the ability of the candidates to address important social issues. Background information on respondents includes age, gender, political party affiliation, voting history, religion, education, marital status, children, employment status, labor union membership, languages spoken, travel to the United States, socio-economic status, and household income.