This is the Franklin & Marshall College / Opinion Research Poll -- done between July 29th and August 4th of registered voters in Pennsylvania (295 Democrats and 81 Independents). The margin of error is about 8.7 points.
This is the SurveyUSA Poll -- done August 1st and 5th of 528 likely Democratic primary voters in California. The margin of error is 6.3 points.
This is the Monmouth University Poll -- done between August 1st and 4th of 401 Iowa voters likely to attend the Democratic caucus. The margin of error is 4.9 points.
This is the Suffolk University / Boston Globe Poll -- done between August 1st and 4th of 500 likely New Hampshire Democratic primary voters. The margin of error is 4.4 points.
