Radar OPEU, n. 21: 2026 U.S. Midterm Elections — Source Tracker
Credit: Design Studio
By Wayne Selcher, with the support of Perplexity AI* [Radar OPEU] [Midterms]
In this new issue of Radar OPEU, I provide a useful reference list of academically credible outlets tracking the 2026 midterm cycle. All the selected sources have been verified.
GENERAL TRACKING RESOURCES
Nonpartisan Race Ratings & Forecasting
| Source | What it covers | Link |
| Cook Political Report | Standard nonpartisan House/Senate/gubernatorial race ratings, updated continuously | cookpolitical.com |
| Sabato’s Crystal Ball (UVA Center for Politics) | Race ratings plus historical-pattern analysis grounded in political-science reasoning | centerforpolitics.org/crystalball |
| Inside Elections | Long-running nonpartisan ratings service, frequently cited alongside Cook and Sabato | new.insideelections.com |
| Split Ticket | Data-driven regression-based House model and candidate-quality analysis | split-ticket.org |
Statistical / Polling Aggregation
| Source | What it covers | Link |
| Nate Silver, Silver Bulletin | Generic-ballot average and full midterm forecast model with transparent methodology | natesilver.net |
| G. Elliott Morris, Strength In Numbers | Ongoing polling analysis and a Verasight-partnered poll series | gelliottmorris.com |
Academic & Policy Research Institutions (general hubs)
| Source | What it covers | Link |
| Brookings Institution — “The 2026 Midterm Elections” collection | Actively updated hub: historical patterns, Trump approval effects, candidate quality | brookings.edu/collection/the-2026-midterm-elections |
| Pew Research Center | Rigorous survey work on voter attitudes, economy, election confidence | pewresearch.org/topic/politics-policy/us-elections-voters |
| MIT Election Data and Science Lab | Turnout, administration, and election-performance data (methodologically rigorous, less horse-race) | electionlab.mit.edu |
| UMass Amherst Poll | Academically run national public-opinion poll series | umass.edu/poll |
Official / Primary Data
| Source | What it covers | Link |
| AP VoteCast | Survey-based alternative to exit polls; citable primary data on voter motivations | ap.org/elections/solutions/services/ap-votecast |
| AP 2026 Midterm Election Hub | Ongoing results and reporting hub | apnews.com/projects/elections-2026 |
POLARIZATION
Scholarly & Data Sources
| Source | What it covers | Link |
| ANES — American National Election Studies | Core academic dataset for U.S. voting behavior, ideology, and polarization; cumulative time-series files plus a 2024/2026 study wave | electionstudies.org |
| Polarization Research Lab (Dartmouth, dir. Sean Westwood) | Ongoing weekly national surveys tracking affective polarization and political violence attitudes | americaspoliticalpulse.com |
| VoteView (Poole & Rosenthal, DW-NOMINATE) | Standard quantitative measure of congressional ideological polarization, updated each Congress | voteview.com/articles/party_polarization |
| Pew Research Center — Political Polarization | Long-running topic hub; includes the newly released 2026 Political Typology | pewresearch.org/…/political-polarization |
| American Political Science Review — “A New Measure of Affective Polarization” | Peer-reviewed methodological contribution on measuring affective polarization | cambridge.org (APSR) |
| Bright Line Watch | Expert-survey project on democratic norms/erosion, regularly cited alongside polarization research | brightlinewatch.org |
| PRRI — American Values Survey / American Values Atlas | Academically grounded survey research on values-based and religious polarization | prri.org/american-values-survey |
| Stanford Polarization and Social Change Lab (dir. Robb Willer) | Experimental/behavioral research on reducing partisan animosity | pascl.stanford.edu |
TURNOUT
Scholarly & Data Sources
| Source | What it covers | Link |
| United States Elections Project (Michael McDonald, Univ. of Florida) | Authoritative voting-eligible-population turnout-rate dataset, historical and updated each cycle | electproject.org |
| U.S. Census Bureau — CPS Voting and Registration Supplement | Official biennial survey on who votes/registers, demographic breakdowns | census.gov/topics/public-sector/voting |
| Comparative Study of Electoral Systems (CSES) | Cross-national survey module enabling comparative turnout/polarization analysis (useful for Brazil–U.S. comparative work) | cses.org |
| ANES (also covers turnout) | Same core dataset as above — includes validated-vote and self-reported turnout measures | electionstudies.org |
MEDIA COVERAGE & CAMPAIGN ADVERTISING
Scholarly & Data Sources
| Source | What it covers | Link |
| Wesleyan Media Project | The standard academic tracker of political TV/digital ad spending and content; directed by Erika Franklin Fowler (Wesleyan), Michael M. Franz (Bowdoin), and Travis N. Ridout (Washington State) | mediaproject.wesleyan.edu |
| NYU Center for Social Media, AI, and Politics (CSMaP, co-dir. Jonathan Nagler & Joshua Tucker) | Academic research on social media’s role in the online information environment, polarization, and political behavior | csmapnyu.org |
| Annenberg Public Policy Center (Univ. of Pennsylvania) / FactCheck.org | Academic policy center studying political communication, ad-claim accuracy, and misinformation | annenbergpublicpolicycenter.org |
| Political Communication (journal, Taylor & Francis) | Leading peer-reviewed journal on campaign communication and media effects | tandfonline.com/toc/upcp20/current |
| Harvard Shorenstein Center on Media, Politics and Public Policy | Academic hub for research on election media coverage | hks.harvard.edu (Shorenstein) |
| Brennan Center for Justice | Nonpartisan legal/policy institute research on disinformation and social media’s role in elections | brennancenter.org |
| AdImpact Political Projection Report | Industry-standard (non-academic) political ad-spending data, widely cited as a primary data source alongside Wesleyan Media Project | adimpact.com/reports/political-projection-2025-2026 |
VOTER KNOWLEDGE & POLITICAL INFORMATION
Scholarly & Data Sources
| Source | What it covers | Link |
| Annenberg Public Policy Center — Civics Knowledge Survey (annual Constitution Day survey) | University of Pennsylvania survey tracking Americans’ knowledge of government structure, rights, and institutions; contributors include Kathleen Hall Jamieson and Matt Levendusky | annenbergpublicpolicycenter.org/…/civics-knowledge-survey |
| Pew Research Center — Civics Quiz & Political Knowledge | Ongoing public-facing knowledge quizzes plus survey research on perceived political information/misperception (e.g., partisan “winning/losing” gap) | pewresearch.org civics quiz |
| Delli Carpini & Keeter, What Americans Know about Politics and Why It Matters | The foundational academic text establishing how political knowledge is measured and why it matters for democratic participation | Penn repository — “Measuring Political Knowledge” |
| Public Opinion Quarterly — “Rethinking the Role of Political Information” | Peer-reviewed reassessment of how political information affects opinion and behavior | academic.oup.com/poq |
| Cambridge Elements — News Use, Political Knowledge, and Misperceptions in 18 Countries Across the Global North | Stuart Soroka (UCLA, Communication & Political Science) comparative study linking news-media type to political knowledge and misperceptions | cambridge.org/core/elements |
| Political Behavior (journal, Springer) | Peer-reviewed journal regularly publishing political-knowledge and information-processing research | link.springer.com/journal/11109 |
CAMPAIGN FINANCE & OUTSIDE SPENDING
Scholarly & Data Sources
| Source | What it covers | Link |
| Federal Election Commission (FEC) — Campaign Finance Data | The official primary-source dataset underlying virtually all U.S. campaign finance research | fec.gov/data |
| OpenSecrets (Center for Responsive Politics) | Nonpartisan, widely cited-by-academics tracker of outside spending, super PACs, and dark money | opensecrets.org/outside-spending |
| FollowTheMoney.org (National Institute on Money in Politics) | State-level campaign finance data, complementing the FEC’s federal-only coverage | followthemoney.org |
| Database on Ideology, Money in Politics, and Elections (DIME), Adam Bonica (Stanford) | Core academic dataset linking campaign contributions to common-space ideology scores; widely used in political science research | web.stanford.edu/~bonica/data.html |
| Election Law Journal: Rules, Politics, and Policy (Sage/Liebert) | Peer-reviewed journal covering election law and campaign finance regulation | liebertpub.com/toc/elj |
| Issue One | Nonpartisan money-in-politics research and reform organization tracking dark money and super PAC spending | issueone.org/issues/money-in-politics |
ELECTION ADMINISTRATION & VOTING ACCESS
Scholarly & Data Sources
| Source | What it covers | Link |
| U.S. Election Assistance Commission (EAC) | Official federal agency source on election administration, poll-worker recruitment, and voting accessibility | eac.gov |
| MIT Election Data and Science Lab — Elections Performance Index | Methodologically rigorous cross-state metrics on how well elections are administered | electionlab.mit.edu |
| Brennan Center for Justice — State Voting Laws Roundups | Recurring nonpartisan legal tracker of state-level voting-law changes | brennancenter.org/series/state-voting-laws-roundups |
| National Conference of State Legislatures (NCSL) | Nonpartisan legislative tracking of voter ID, early voting, and election-administration bills across all 50 states | ncsl.org/elections-and-campaigns |
| Election Law Blog (Richard L. Hasen, UCLA School of Law) | Leading academic legal commentary and analysis on election law developments | electionlawblog.org |
| Verified Voting | Nonpartisan nonprofit research on voting equipment, election security, and auditability | verifiedvoting.org |
| Council on Foreign Relations (CFR) | Nonpartisan think tank analysis of election administration disputes (e.g., mail-in voting, USPS rules) | cfr.org |
Notes for citation
Brookings, Pew, MIT Election Lab, and UMass Poll carry the most institutional academic weight for scholarly citation.
Cook, Sabato’s, Inside Elections, Split Ticket, and Silver Bulletin/Strength In Numbers are the standard “living” trackers to cite for real-time race assessments as the cycle progresses.
CRS reports and named-author university-affiliated pieces (Harvard Kennedy School, LSE USAPP, UVA-affiliated experts) are the strongest citations when a reviewer expects individual scholarly authorship rather than institutional. 
* Wayne A. Selcher, PhD, is Professor of International Studies Emeritus, Department of Political Science, Elizabethtown College, PA, USA, and a regular contributor to OPEU. His major academic interests are Comparative Politics, American society and politics in comparative context, American Foreign Policy, Latin American Politics and Foreign Policy (especially Brazil), and Internet use in international studies teaching and research. He is the creator and editor of the WWW Virtual Library: International Affairs Resources, a web guide for online international studies research in many topics. E-mail: wayneselcher@comcast.net.
** Review and edit: Tatiana Teixeira. This content does not necessarily reflect the opinion of OPEU, or INCT-INEU.
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