58% Romney
14% Paul
11% Santorum
6% Gingrich
3% Others
7% Undecided
Cell phone and home phone respondents included in this research: SurveyUSA interviewed 1,680 Oregon adults 05/07/12 through 05/10/12. Of the adults, 1,468 were registered to vote. Of the registered voters, SurveyUSA determined that 425 had already returned a ballot or were likely to do so in the 05/15/12 Republican primary, and that 432 had already returned a ballot or were likely to do so in the 05/15/12 Democratic primary. This research was conducted using blended sample, mixed-mode. Respondents reachable on a home telephone (83% of registered voters) were interviewed on their home telephone in the recorded voice of a professional announcer. Respondents unreachable on a home telephone (17% of registered voters) were shown a questionnaire on their smartphone, tablet, laptop or other electronic device. In this research, cell respondents and home phone respondents vote differently. Obama's advantage over Romney comes entirely from cell-phone respondents. Cell respondents are 17 points more likely to vote Obama than are home-phone respondents. Among respondents interviewed on their home phone, the Obama-Romney contest is tied. 68% of the interviews for this survey were completed before President Obama announced his support of same-sex marriage. 32% of interviews for this survey were completed after Obama's announcement.
http://www.surveyusa.com/client/PollReport.aspx?g=19eb906a-ae83-463b-9daa-3c3bda489d7d