Pollster · Commercial firm

Opinion Diagnostics

Research draft

Polls since 2024: 1
Latest poll ended: April 24, 2026

Polls from the VoteHub polling API, used under CC BY 4.0. Each result links to the pollster's or sponsor's own release. Imported once a day; a poll VoteHub later changes keeps its earlier version on record here.

§1About

Drafted by AI from the public sources cited. Each sentence links to its source.

Opinion Diagnostics describes itself as a polling, market research and data analytics firm based in New England and the Carolinas, and its website gives an address in Mansfield, Massachusetts.¹ Its team page names Brian Wynne as president and Patrick Sebastian as partner, and says Wynne was campaign manager and senior political advisor to Massachusetts Governor Charlie Baker and Lieutenant Governor Karyn Polito and earlier executive director of the Massachusetts Republican Party.² Its news page lists public polls for clients including Common Cause North Carolina, Pioneer Institute, RightCount, the NCAA and two candidate campaigns, along with Republican primary polls in North and South Carolina.³

Kind: Commercial firm^1,4
Founded: 2023^2,4

§2Who it works with

Why this matters: Owners, news partners and the firms behind a poll's interviews shape what gets asked, how, and what gets published.

Polls regularly for

Common Cause North Carolina (2025–now). Its news page lists four Common Cause North Carolina releases of its polls between October 2025 and September 2026, on redistricting, early voting, judicial independence and the U.S. Senate race.^3,5
Pioneer Institute (2023–now). Its news page lists Pioneer Institute releases of its surveys in September 2023, January 2026 and twice in March 2026.³

Founded by

Brian Wynne (2023). Brian Wynne announced the launch of Opinion Diagnostics on March 20, 2023, and its team page says he founded its predecessor, Mass Political Marketing.^2,4

Led by

Brian Wynne. Its team page lists Brian Wynne as president.²

§3Whom it works for

Why this matters: A firm that also works for one party's campaigns can still publish accurate polls, but readers deserve to know.

Works for Republican candidates or groups, by its federal filings. From 2023 through 2026, 5 federal committees reporting Republican affiliation paid it, and none reporting Democratic^6,7,8,9. Its website says it works for campaigns, advocacy groups and businesses and does not say which party; the campaign clients its news page names are John Deaton's 2024 Senate campaign in Massachusetts and Ken Block's 2026 campaign for Rhode Island governor, which its release lists as independent, so the named clients do not fit the one-party rule.^1,3,10,11

John Deaton (2024–now). Its release of October 2, 2024 says it polled 638 likely Massachusetts voters for John Deaton's U.S. Senate campaign.¹⁰
Ken Block (2026–now). Its news page lists three 2026 polls for the Block for Governor campaign in Rhode Island, and its October 2026 release lists Ken Block as an independent candidate.^3,11

Of its 1 poll listed since the 2024 election, VoteHub flags 0 as paid for by a Democratic-aligned sponsor and 1 by a Republican-aligned sponsor¹².

Federal campaigns and committees that paid it

From 2023 through 2026, 7 federal committees reported paying Opinion Diagnostics $199,568 for polling, surveys or research^6,7,8,9. By the party each committee reports to the FEC: 0 Democratic, 5 Republican, and 2 none (most PACs and super PACs report none).

The largest payers, by amount paid for polling, surveys or research. Only federal committees report to the FEC; state and local campaigns, work paid through another consultant, and polling billed as consulting are not here. Matched by the payee name on the filing: OPINION DIAGNOSTICS; OPINION DIAGNOSTICS LLC.
Committee	Kind	Party it reports	Paid for polling	Between
TEAM GRAHAM, INC.	Senate campaign	Republican	$51,000	July 7, 2025 – May 8, 2026
JOHN DEATON FOR SENATE INC.	Senate campaign	Republican	$42,768	May 24, 2024 – October 29, 2024
INDEPENDENTS MOVING THE NEEDLE	Super PAC	None reported	$40,000	February 6, 2024
SANDY ROBERSON FOR NC	House campaign	Republican	$23,500	March 28, 2023
CONSERVATIVES FOR AMERICAN EXCELLENCE INC.	Super PAC	None reported	$17,300	August 19, 2026
FRIENDS OF KELLEN CURRY	House campaign	Republican	$15,000	December 7, 2023
MIKE JOHNSON FOR LOUISIANA	House campaign	Republican	$10,000	November 7, 2024

§4Its polls

The 1 polls of its we list, newest first.
In the field	Question	Result	With	Paid for by	Sample
April 21–April 24, 2026	U.S. Senate · 2026 North Carolina	Roy Cooper 50.4 · Michael Whatley 41.4		Republican-aligned sponsor	830 LV

§5What we looked for and didn't find

No ownership beyond its founder was found.
No standing news partner was found.
No fieldwork or panel vendor was named on the pages read.
The sample release for its poll in our files is a post on X, which was not read, so which poll it reports was not checked.
Searches found no AAPOR statement, court ruling, regulator action, aggregator statement about excluding or reweighting its polls, or retraction by the firm.