Battle Ground States, 2008 Presidential Election, Obama's Gain vs. lead over McCain

Image: 
battlegroundstates9-8.png
Notes: 
Chart shows scatter plot of Obama's change in voting margin vs. John Kerry's voting margin in 2004 charted against Obama's lead over John McCain in Pollster.com data as of 9/8/08.
Source: 
Election data courtesy Dave Leip's Atlas of U.S. Presidential Elections Poll data courtesy of Pollster.com, extracted 9/8/08