NBC News/Marist Poll South Carolina Annotated Questionnaire February 2020 SC Adults: n=2,661; MoE +/- 2.4 SC Registered Voters: n=2382; MoE +/- 2.6 SC Potential Democratic Electorate: n=997; MoE +/- 4.0 SC Likely Democratic Primary Voters n=539; MoE +/- 6.0 Do you approve or disapprove of the job Donald Trump is doing as president? Do you approve or disapprove of the job Donald Trump is doing as president? [And, would you say you strongly approve/disapprove of the job he is doing or just approve/disapprove?] NBC News/Marist Poll SC February 2020 Column % Column % Column % Column % 51% 53% 14% 12% 41% 41% 80% 84% Vol: Unsure 8% 6% 6% 4% Strongly approve 39% 41% 9% 8% Approve 12% 12% 5% 4% Disapprove 11% 10% 17% 17% Strongly disapprove 30% 31% 63% 67% 8% 6% 6% 4% 36% 35% 77% 81% 51% 53% 13% 9% 14% 12% 11% 9% n/a n/a 25% 27% 23% Vol: Unsure South Carolina Democratic Primary Persuadable Voters SC Likely Democratic Primary Voters Approve A Congress controlled by Democrats A Congress controlled by Republicans If the Democratic presidential primary in South Carolina were held today, whom would you support if the candidates are: [If undecided: If you had to decide today, are you leaning more towards:] [If already voted: Whom did you support in the Democratic presidential primary in South Carolina?] [Asked of Potential Democratic Electorate] SC Potential Democratic Electorate Disapprove Unsure Knowing it is a long ways off, what is your preference for the outcome of this year´s congressional elections: SC Adults SC Registered Voters Joe Biden Bernie Sanders n/a n/a 24% Tom Steyer n/a n/a 15% 15% Pete Buttigieg n/a n/a 9% 9% Elizabeth Warren n/a n/a 8% 8% Amy Klobuchar n/a n/a 5% 5% Tulsi Gabbard n/a n/a 3% 3% Other n/a n/a 2% 2% Undecided n/a n/a 9% 9% n/a n/a 28% 27% 1 Would you say that you strongly support somewhat support , or do you think that you might vote differently on Primary Day? [Asked of Potential Democratic Electorate with a Candidate Preference] In selecting a presidential nominee for the Democratic Party, which of the following is most important to you: [Asked of Potential Democratic Electorate] SC Potential Democratic Electorate SC Likely Democratic Primary Voters Column % Column % Column % Column % Strongly support n/a n/a 54% 60% Somewhat support n/a n/a 28% 23% Might vote differently n/a n/a 17% 15% Unsure n/a n/a 2% 2% n/a n/a 50% 47% 44% A candidate who comes closest to your views on issues A candidate with the best chance to defeat Donald Trump If November's election for U.S. Senate in South Carolina were held today, whom would you support if the candidates are: [If undecided: If you had to decide today, are you leaning more towards:] [Asked of Registered Voters] SC Adults SC Registered Voters n/a n/a 41% Vol: Both n/a n/a 6% 7% Vol: None/Other n/a n/a 1% 1% Vol: Unsure n/a n/a 1% 1% n/a 37% 78% 82% n/a 54% 16% 13% n/a 2% 1% 1% Jaime Harrison, the Democrat Lindsey Graham, the Republican Vol: Other 7% 5% 4% Vol: Undecided n/a Nature of the Sample: NBC News/Marist Poll of 2,661 South Carolina Adults This survey of 2,661 adults was conducted February 18th through February 21st, 2020 by The Marist Poll sponsored in partnership with NBC News. Adults 18 years of age and older residing in the state were contacted on landline or mobile numbers and interviewed by telephone using live interviewers. Survey questions were available in English. Mobile telephone numbers were randomly selected based upon a list of telephone exchanges from throughout the state from Dynata (formerly Survey Sampling International). The exchanges were selected to ensure that each region was represented in proportion to its population. Mobile phones are treated as individual devices. After validation of age, personal ownership, and non-business-use of the mobile phone, interviews are typically conducted with the person answering the phone. To increase coverage, this mobile sample was supplemented by respondents reached through random dialing of landline phone numbers. Within each landline household, a single respondent is selected through a random selection process to increase the representativeness of traditionally under-covered survey populations. Assistance was provided by Luce Research for data collection. The samples were then combined and balanced to reflect the 2017 American Community Survey 5-year estimates for age, gender, income, race, and region. Results are statistically significant within ±2.4 percentage points. There are 2,382 registered voters. The results for this subset are statistically significant within ±2.6 percentage points. There are 997 voters in the potential Democratic primary electorate. The potential Democratic primary electorate in South Carolina includes all voters who prefer to vote in the Democratic presidential primary and those who identify as Democrats or Democratic leaning independents without a primary preference. The results for this subset are statistically significant within ±4.0 percentage points. There are 539 likely Democratic primary voters defined by a probability turnout model which determines the likelihood respondents will participate in the 2020 South Carolina Presidential Primary based upon their chance of vote, interest in the primary election, and past primary participation. The results for this subset are statistically significant within ±6.0 percentage points. Tables include results for subgroups with a minimum sample size of 100 unweighted completed interviews as to only display crosstabs with an acceptable sampling error. It should be noted that although you may not see results listed for a certain group, it does not mean interviews were not completed with those individuals. It simply means the sample size is too small to report. The error margin was adjusted for sample weights and increases for cross-tabulations. NBC News/Marist Poll SC February 2020 2