When SurveyUSA asked Michigan voters about locally licensed medical marijuana dispensaries, there was a 38-point difference between how home-phone and cell-phone respondents answered. SurveyUSA poll of 608 MI registered voters released 10/15/11.

Polls that exclude cell-phone respondents, such as those conducted by many SurveyUSA competitors, risk mis-characterizing public opinion. SurveyUSA estimates that by Election 2012, half of voters age 25 to 34, and one-third of voters age 35 to 44, will not be reachable on a home-phone. Make certain the polls you commission, and the competing polls you analyze, properly account for cell-phone respondents.