News organizations put their best efforts into covering presidential campaigns. Some that I like best are:
2020 Presidential Election Calendar - NY Times with delegate counts
Politico Campaign 2020 - which gives full coverage of issues, positions, and well-written and edited news. T
OntheIssues.org site that tries to keep track of "Every political leader on every issue"
New York Times Politics has deep coverage and is also looked at closely by the campaigners themselves.
CNN Election Coverage is like the New York Times in both the depth of coverage (much more video) and the recipricol influence it has on candidates.
CQ Weekly is an important news magazine for covering events related to the federal government. It also has a Floor Vote Search for searching how candidates voted if they were-- or are in Congress. For instance, search on the keyword "Mccain" or the keyword "Obama."
National Journal Political Resources Reports on politics and policy for an academic audience. Also has features such as Ad Spotlight, Poll Track, and Blogmeter.
Dave Leip's Atlas of U.S. Presidential Elections.tracks election results in 2016 primaries and past elections in maps.
The Huffington Post has a decidely liberal slant, but is useful for the latest political gossip.
Fox News Politics seems to lean strongly conservative and serves as a good bellwether of conservative thinking and gossip.
FactCheck.org is a good place to find the latest rumors about candidates. This site describes itself as "nonpartisan, nonprofit "consumer advocate" for voters that aims to reduce the level of deception and confusion in
A project of the St. Petersburg Times that tracks the claims and campaign promises and subsequent words and actions of politicians and pundits.
The Green Papers has details on elections as well as an archive on elections going back to the 2000 election.
CQ's Vital Statistics on American Politics has historical tables of primary and election results-- it's useful more as a guide to sources than actual numbers for this project.
100 Years of US Elections in the database Social Explorer The presidential, senatorial, congressional and gubernatorial election data come from Dave Leip's Atlas of U.S. Presidential Elections. Building on our recent release of 2004-12 election data, these maps now span over a century: presidential elections 1912 to the present, gubernatorial elections (including off-year elections) from 1990 to present, and congressional elections from 2000 to the present. The election data are displayed down to the district and county levels. Click here to get started with the maps. In addition to winners and voter turnouts, the maps also include voting age population, citizens of voting age population, and competitiveness.
Why Trump can Win Pennsylvania by Brandon Finnigan National Review July 25, 2016 Detailed look at voting records across counties for the past 25 years with maps.
Statistics for presidential elections by state can be found in the print reference book America Votes.
America at the polls : a handbook of American presidential election statistics and Congressional Quarterly's Guide to U.S. elections go back to 1956.
CQ Weekly (aka Congressional Quarterly Weekly Report) reports on elections and has been doing so since 1956 (1983 to the present is online.) The print is kept in Government Documents in the compact shelving at the end of the Government Documents. Each year has an index to articles.