Question:
If the November 2018 general election for U.S. Senator was being held today and the candidates were (rotated) [Lou Barletta, the Republican and Bob Casey Jr., the Democrat], would you vote for: Lou Barletta, Bob Casey, Jr., some other candidate, or aren't you sure how you would vote?

25% Lou Barletta, the Republican
43% Bob Casey, Jr., the Democrat
2% Some other candidate
30% Do not know

About this Poll
The survey findings presented in this release are based on the results of interviews conducted March 19 – 26, 2018. The interviews were conducted at the Center for Opinion Research at Franklin & Marshall College on behalf of the Center for Politics and Public Affairs. The poll was designed and administered by the staff of the Center for Opinion Research. The data included in this release represent the responses of 423 Pennsylvania registered voters, including 201 Democrats, 163 Republicans, and 58 Independents. The sample of registered voters was obtained from L2, formerly Labels & Lists. All sampled respondents were notified by letter about the survey. Interviews were completed over the phone and online depending on each respondent’s preference. Survey results were weighted (age, gender, education, ideology, and party registration) using an iterative weighting algorithm to reflect the known distribution of those characteristics as reported by the Pennsylvania Department of State and Pennsylvania exit polls. The sample error for this survey is +/- 6.8 percentage points when the design effects from weighting are considered. In addition to sampling error, this poll is also subject to other sources of non-sampling error. Generally speaking, two sources of error concern researchers most. Non-response bias is created when selected participants either choose not to participate in the survey or are unavailable for interviewing. Response errors are the product of the question and answer process. Surveys that rely on self-reported behaviors and attitudes are susceptible to biases related
to the way respondents process and respond to survey questions.