The interactive poll of 19,033 likely voters, which included 501 undecided likely voters and those most likely to change their minds, was conducted from Wednesday through Tuesday (Aug. 11-24, 2004) by the Zogby/Williams Institute. Overall results have a margin of sampling error of +/0.7. Margin of error for undecided voters is +/- 4.5.

Zogby Interactive respondents were invited to participate from panels of likely voters who have agreed to take part in online surveys. Respondents followed instructions leading them to the survey located on secure servers at Zogby Interactive headquarters in Utica, N.Y. All surveys were completed from Wednesday, Aug. 11, through Tuesday Aug. 24, 2004. Slight weights were applied to region, party, age, race, religion and gender to more accurately reflect the voting population in the United States.

Editor's note: