Question:

About this Poll

The samples in each state were drawn from a list of all active registered voters. All respondents are confirmed as registered voters in their states. From June 10 – 22, live interviewers called land lines and cell phones across seven states to survey:

596 Florida voters with a margin of error of +/- 4.0 percentage points;
601 Iowa voters with a margin of error of +/- 4.0 percentage points;
612 Michigan voters with a margin of error of +/- 4.0 percentage points;
603 North Carolina voters with a margin of error of +/- 4.0 percentage points;
617 Ohio voters with a margin of error of +/- 3.9 percentage points;
601 Pennsylvania voters with a margin of error of +/- 4.0 percentage points.
612 Virginia voters with a margin of error of +/- 3.9 percentage points.

The results were weighted to approximate major demographic targets based on Census data for each state. The modeled results were predicted using the voter-file matched sample using a wide range of political and demographic variables and weighted for expected turnout probability in a presidential election.

Interviews were conducted by Opinion Access Corporation of Long Island City, New York. Since 1995, Opinion Access Corp. has been an industry leader in telephone opinion polling with an emphasis on political polling. Their facility utilizes more than 375 stations and uses 100% computer-assisted telephone interviewing (CATI).