How the AP-Yahoo News Poll was conducted (AP via Yahoo News)

The AP-Yahoo News Poll is a unique study that will track the moods and opinions of a group of people throughout the presidential election campaign. The seventh wave of this study included re-interviews of 1,740 people between Sept. 5-15 who were originally interviewed in November or early December. The extensive national survey was conducted by Knowledge Networks of Menlo Park, Calif., under ...