2008 US Presidential Elections

Analysis by ISU Statistical Graphics Working Group


(Top) Show results of the daily tracking polls, and the actual popular vote (blue). Main pollsters are colored, so that relative bias can be seen. The trend line is a loess smooth through all points.

(Right) The result for each state (blue, red) and polls for each state over the week leading up to the election are shown as a dot plot. From top to bottom, the order of the states is from most Republican to most Democratic.

Median is represented as a black dot, all polls as large white dots, and median of last week’s as a grey dot. Vertical lines mark 5% points difference.

(Bottom) Show the daily tracking results separately for Obama and McCain, and the actual result. Tracking polls low-balled the McCain %.