Elections and Presidents
Election Polling Overview
The Roper Center holds the most comprehensive collection of U.S. election-related polling data including the National Election Pool and Votecast exit polls, earlier media-sponsored exit polls, pre-election opinion polls, as well as the federally funded ANES (American National Election Studies), CES (Congressional Election Study), and the newest addition, the CMS (Collaborative Midterm Survey). Each of these surveys utilizes a different methodology and therefore each has strengths and weaknesses. This guide is intended to help researchers find the data that is best suited to their research question.