This TIME Magazine poll was conducted by telephone between August 22-26, 2007 among a random sample of 519 registered voters in Iowa, age 17 and older, likely to attend the 2008 Democratic caucuses. The sample source was a list of registered Democratic and Independent voters in Iowa provided by Voter Contact Services. These registered voters were screened to determine their likelihood of attending the 2008 Iowa Democratic caucuses. Likely voters included in the sample included those who said they were 100% certain that they would attend the Iowa caucuses, or probably going to attend and reported that they had attended a previous Iowa caucus.

The margin of error for the entire sample is approximately +/- 5 percentage points. The margin of error is higher for subgroups. Surveys are subject to other error sources as well, including sampling coverage error, recording error, and respondent error. Data were weighted to approximate the 2004 Iowa Democratic Caucus "Entrance Polls," conducted January 19, 2004.

Turnout in primary elections and caucuses tends to be low, with polls at this early stage generally overestimating attendance. The sample included cell phone numbers, which, to the extent SRBI was able to identify them, were dialed manually.

NOTE: THESE NUMBERS ARE FROM TIME MAGAZINE, SEPT. 10 2007. THE NUMBERS IN THE LINK MAY DIFFER