| Harper Polling (R) 🇺🇸 United States · 2026 United States Senate election in North Carolina | 22 Oct 2026 | 18 Sept 2026 – 20 Sept 2026 | 608 | ±4 | — | - Cooper (D) 49.0%
- Whatley (R) 39.0%
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| Harper Polling (R) 🇺🇸 United States · 2026 United States Senate election in North Carolina | 17 Sept 2026 | 13 Sept 2026 – 15 Sept 2026 | 608 | ±4 | — | - Cooper (D) 49.0%
- Whatley (R) 34.0%
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| Harper Polling (R) 🇺🇸 United States · 2026 United States Senate election in North Carolina | 13 Aug 2026 | 9 Aug 2026 – 10 Aug 2026 | 600 | ±4.0 est. (Not published: estimated from sample size (95%, simple random sample)) | — | - Cooper (D) 52.0%
- Whatley (R) 39.0%
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| Harper Polling (R) 🇺🇸 United States · 2026 United States Senate election in North Carolina | 14 May 2026 | 10 May 2026 – 11 May 2026 | 600 | ±4.0 est. (Not published: estimated from sample size (95%, simple random sample)) | — | - Cooper (D) 50.0%
- Whatley (R) 39.0%
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| Harper Polling (R) 🇺🇸 United States · 2026 North Carolina Senate Republican primary | 26 Feb 2026 | 22 Feb 2026 – 23 Feb 2026 | 600 | ±4.0 est. (Not published: estimated from sample size (95%, simple random sample)) | — | - Whatley (R) 38.0%
- Brown (R) 8.0%
- Morrow (R) 2.0%
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| Harper Polling (R) 🇺🇸 United States · 2026 Texas Senate Republican primary | 8 Jan 2026 | 5 Jan 2026 – 7 Jan 2026 | 600 | ±4.0 est. (Not published: estimated from sample size (95%, simple random sample)) | — | - Paxton (R) 31.0%
- Cornyn (R) 26.0%
- Hunt (R) 23.0%
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| Harper Polling (R) 🇺🇸 United States · 2026 United States Senate election in North Carolina | 13 Nov 2025 | 9 Nov 2025 – 10 Nov 2025 | 600 | ±4.0 est. (Not published: estimated from sample size (95%, simple random sample)) | — | - Cooper (D) 47.0%
- Whatley (R) 39.0%
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