The SurveyUSA poll of 419 likely GOP runoff voters has Kingston with 52 percent of the vote. Perdue has 41 percent. 7 percent are undecided. The poll was conducted by phone June 3-5. The poll has a margin of error of 3.2 percent.
Click here to view the full data. GOP voters will vote in the runoff July 22.
The same poll shows Republican Gov. Nathan Deal leading Democratic Sen. Jason Carter 44-38 percent. Libertarian Andrew Hunt got 7 percent. 11 percent of respondents said they were undecided.
The poll shows either Republican, Perdue or Kingston, would beat Democrat Michelle Nunn in November. Kingston would win 43-37; Perdue would win 43-38.