About this Poll
The Marquette Law School Poll is the most extensive statewide polling project in Wisconsin history. This poll interviewed 802 registered Wisconsin voters by landline or cell phone, September 15-18, 2016. The margin of error is +/- 4.4 percentage points for the full sample. For likely voters, the unweighted sample size is 677 and weighted sample size is 642, with a margin of error of +/-4.8 percentage points.

The partisan makeup of the full registered-voter sample, including those who lean to a party, is 45 percent Republican, 47 percent Democratic and 7 percent independent. The long-term estimate over the previous 38 statewide Marquette polls, with 32,949 respondents, is 42 percent Republican and 48 percent Democratic, with 9 percent independent. The partisan makeup of this sample, excluding those who lean to a party, is 31 percent Republican, 31 percent Democratic and 34 percent independent, compared to the long-term estimate of 27 percent Republican, 31 percent Democratic and 38 percent independent.