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Each poll as published, with its pollster, fieldwork dates, sample size and a link to the source.

How to read a poll

Sample size is how many people were asked. More people means less random error, never none.
±3 is the margin of error: the real figure is likely within 3 points either way of the one shown.
Two polls can differ because they were taken on different dates, with different methods and different samples.
est. means the institute did not publish a margin of error, so it is estimated from the sample size.
The average smooths this out: it combines recent polls, so one unusual poll cannot swing the picture.

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Polls with institute, dates, sample, margin of error, methodology and results
Institute	Date	Fieldwork	Sample	MoE	Method	Voting intention	Source
Tulchin Research (D) 🇺🇸 United States · 2026 United States Senate special election in Ohio	10 Aug 2026	29 Jul 2026 – 4 Aug 2026	600	±4.0 est. (Not published: estimated from sample size (95%, simple random sample))	—	Brown (D) 47.0% Husted (R) 43.0%	Source for Tulchin Research (D) poll (opens in a new tab)
Tulchin Research (D) 🇺🇸 United States · 2026 Ohio gubernatorial election	10 Aug 2026	29 Jul 2026 – 4 Aug 2026	600	±4.0 est. (Not published: estimated from sample size (95%, simple random sample))	—	Acton (D) 46.0% Ramaswamy (R) 44.0%	Source for Tulchin Research (D) poll (opens in a new tab)
Tulchin Research (D) 🇺🇸 United States · 2026 Michigan Senate Democratic primary	20 Jul 2026	13 Jul 2026 – 15 Jul 2026	500	±4.4 est. (Not published: estimated from sample size (95%, simple random sample))	—	El-Sayed (D) 56.0% Stevens (D) 40.0%	Source for Tulchin Research (D) poll (opens in a new tab)
Tulchin Research (D) 🇺🇸 United States · 2026 Michigan Senate Democratic primary	1 Jul 2026	24 Jun 2026 – 28 Jun 2026	500	±4.4 est. (Not published: estimated from sample size (95%, simple random sample))	—	El-Sayed (D) 46.0% Stevens (D) 27.0% McMorrow (D) 17.0%	Source for Tulchin Research (D) poll (opens in a new tab)
Tulchin Research (D) 🇺🇸 United States · 2026 United States Senate special election in Ohio	17 Jun 2026	2 Jun 2026 – 4 Jun 2026	600	±4.0 est. (Not published: estimated from sample size (95%, simple random sample))	—	Brown (D) 46.0% Husted (R) 42.0%	Source for Tulchin Research (D) poll (opens in a new tab)
Tulchin Research (D) 🇺🇸 United States · 2026 Michigan Senate Democratic primary	5 Jun 2026	19 May 2026 – 25 May 2026	500	±4.4 est. (Not published: estimated from sample size (95%, simple random sample))	—	El-Sayed (D) 41.0% Stevens (D) 23.0% McMorrow (D) 18.0%	Source for Tulchin Research (D) poll (opens in a new tab)
Tulchin Research (D) 🇺🇸 United States · 2026 United States Senate election in Michigan	5 Jun 2026	2 Jun 2026 – 4 Jun 2026	500	±4.4 est. (Not published: estimated from sample size (95%, simple random sample))	—	El-Sayed (D) 46.0% Rogers (R) 41.0%	Source for Tulchin Research (D) poll (opens in a new tab)
Tulchin Research (D) 🇺🇸 United States · 2026 Ohio gubernatorial election	4 Jun 2026*	2 Jun 2026 – 4 Jun 2026	600	±4.0 est. (Not published: estimated from sample size (95%, simple random sample))	—	Acton (D) 47.0% Ramaswamy (R) 44.0%	Source for Tulchin Research (D) poll (opens in a new tab)
Tulchin Research (D) 🇺🇸 United States · 2026 Illinois Senate Democratic primary	9 Mar 2026	4 Mar 2026 – 8 Mar 2026	600	±4.0 est. (Not published: estimated from sample size (95%, simple random sample))	—	Krishnamoorthi (D) 39.0% Stratton (D) 28.0% Kelly (D) 12.0%	Source for Tulchin Research (D) poll (opens in a new tab)
Tulchin Research (D) 🇺🇸 United States · 2026 Illinois Senate Democratic primary	19 Feb 2026*	14 Feb 2026 – 19 Feb 2026	600	±4.0 est. (Not published: estimated from sample size (95%, simple random sample))	—	Krishnamoorthi (D) 42.0% Stratton (D) 26.0% Kelly (D) 10.0%	Source for Tulchin Research (D) poll (opens in a new tab)

* End of fieldwork: the source states no publication date.

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