Kifer, Parkin, and Druckman content analysis of over 1000 House and Senate candidates' Web sites over multiple election cycles. Data include information on candidate and district characteristics. At present, data from three election studies (2002, 2004, 2006) is available; 2008 and 2010 will be released in the future. Data is in .tsv, R, and Stata formats.
Nonpartisan project based at GWU documenting the presidential campaigns from 2000-2016. Especially useful for extensive information about general election and primary campaign organizations for the major candidates. Basis for a dataset coding field offices by county for 2004–2008 (Democrat) and 2012 (Democrat and Republican).
Full video coverage of the Democratic and Republican parties' national conventions, 2000–present. Includes some coverage from 1984 and 1996 as well as some third party conventions (e.g., Reform Party in 2000, Libertarian in 2016).
Click link above then enter "nomination and Election of the President and Vice President of the U.S" in search box,
with quotation marks
Congressional Research Service compilation of federal and state laws, party rules, court decisions, Federal Election Commission regulation revisions, and statistical materials on presidential and vice presidential nominations and elections. Printed every 4 years, excepting 1996 and 2004.