Note: As Rick Santorum has dropped out of the race for the Republican nomination, Mitt Romney is the presumptive nominee. As such, this is the final update to the Republican Primary nationwide PD Composite. The Obama v. Romney Composite will now take its place on the page banner.

You can view all previous Republican Primary national and closely contested state PD Composites by following this link.

Note: Click graphic to enlarge.

The Political Derby Composite is a tool that takes the most recent major polls and weighs their results based on poll age, momentum from poll to poll, sample type, and margin of error each day using a proprietary formula. Unlike other poll compilations, this is not a simple average. Rather, it is a data-driven tool that measures voter sentiment on a daily basis. The polls that make up the PD Composite are well-known reputable national polls who sample “likely primary voters” and “registered voters”, as opposed to only “adults, including, but not limited to: NBC News/Wall Street Journal, Pew Research, and Rasmussen Reports. The Composite Poll is a significant factor in determining the Power Rankings.

The PD Composite is updated daily, or as new data becomes available. The PDC will also be featured in semi-regular posts that coincide with significant data shifts. If you would like to comment on the most recent version navigate over to the post page.

Source polls for the PD Composite: ABC News/Washington Post, Bloomberg, CBS News/NY Times, FOX News, McClatchy/Marist College, NBC News/Wall Street Journal, Pew Research, Public Policy Polling, Quinnipiac University, Rasmussen Reports, USA Today/Gallup