Skip to main content
icon for KY-04 Republican Primary Winner
Politics·Primaries

KY-04 Republican Primary Winner

icon for KY-04 Republican Primary Winner
Politics·Primaries

KY-04 Republican Primary Winner

Thomas Massie 73%

Ed Gallrein 29.0%

Nicole Lee Ethington <1%

Robert Wells Jr. <1%

Polymarket

$414,208 Vol.

Thomas Massie 73%

Ed Gallrein 29.0%

Nicole Lee Ethington <1%

Robert Wells Jr. <1%

Polymarket

$414,208 Vol.

Thomas Massie

$272,056 Vol.

73%

Ed Gallrein

$120,119 Vol.

29%

Nicole Lee Ethington

$16,661 Vol.

<1%

Robert Wells Jr.

$6,666 Vol.

<1%

This market will resolve according to the candidate who wins the nomination for the Republican Party to contest the KY-04 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The Republican primary will take place on May 19, 2026. If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other". The resolution source for this market will be a consensus of official Republican sources, including https://www.rnc.org/. Any replacement of the nominee before election day will not change the resolution of the market.Incumbent Rep. Thomas Massie leads trader consensus at 72.5% implied probability to win Kentucky's 4th Congressional District Republican primary on May 19, reflecting his consistent polling edges—such as 52% to 48% in a recent BIGDATAPOLL of likely voters and 47% to 37% in Quantus Insights—bolstered by a $2.5 million Q1 small-donor fundraising haul. Challenger Ed Gallrein holds 29.1% amid President Trump's endorsement, retired Navy SEAL background, and over $10 million in anti-Massie spending by GOP groups, but recent polls show Massie ahead despite the feud. Massie's new ad softening toward Trump priorities, released as early voting nears, underscores the tight race testing Trump's GOP influence in this closed primary, with minor candidates Nicole Lee Ethington and Robert Wells Jr. at negligible levels.

This market will resolve according to the candidate who wins the nomination for the Republican Party to contest the KY-04 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The Republican primary will take place on May 19, 2026.

If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other".

The resolution source for this market will be a consensus of official Republican sources, including https://www.rnc.org/.

Any replacement of the nominee before election day will not change the resolution of the market.
Volume
$414,208
End Date
May 19, 2026
Market Opened
Dec 1, 2025, 4:51 PM ET

Resolver

0x2F5e3684c...
This market will resolve according to the candidate who wins the nomination for the Republican Party to contest the KY-04 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The Republican primary will take place on May 19, 2026. If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other". The resolution source for this market will be a consensus of official Republican sources, including https://www.rnc.org/. Any replacement of the nominee before election day will not change the resolution of the market.
This market will resolve according to the candidate who wins the nomination for the Republican Party to contest the KY-04 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The Republican primary will take place on May 19, 2026. If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other". The resolution source for this market will be a consensus of official Republican sources, including https://www.rnc.org/. Any replacement of the nominee before election day will not change the resolution of the market.Incumbent Rep. Thomas Massie leads trader consensus at 72.5% implied probability to win Kentucky's 4th Congressional District Republican primary on May 19, reflecting his consistent polling edges—such as 52% to 48% in a recent BIGDATAPOLL of likely voters and 47% to 37% in Quantus Insights—bolstered by a $2.5 million Q1 small-donor fundraising haul. Challenger Ed Gallrein holds 29.1% amid President Trump's endorsement, retired Navy SEAL background, and over $10 million in anti-Massie spending by GOP groups, but recent polls show Massie ahead despite the feud. Massie's new ad softening toward Trump priorities, released as early voting nears, underscores the tight race testing Trump's GOP influence in this closed primary, with minor candidates Nicole Lee Ethington and Robert Wells Jr. at negligible levels.

This market will resolve according to the candidate who wins the nomination for the Republican Party to contest the KY-04 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The Republican primary will take place on May 19, 2026.

If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other".

The resolution source for this market will be a consensus of official Republican sources, including https://www.rnc.org/.

Any replacement of the nominee before election day will not change the resolution of the market.
Volume
$414,208
End Date
May 19, 2026
Market Opened
Dec 1, 2025, 4:51 PM ET

Resolver

0x2F5e3684c...
This market will resolve according to the candidate who wins the nomination for the Republican Party to contest the KY-04 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The Republican primary will take place on May 19, 2026. If no nominee is announced by November 3, 2026, 11:59PM ET, this market will resolve to "Other". The resolution source for this market will be a consensus of official Republican sources, including https://www.rnc.org/. Any replacement of the nominee before election day will not change the resolution of the market.

Related

icon for Will Ralph Alvarado be the Republican Nominee for KY-06?

Will Ralph Alvarado be the Republican Nominee for KY-06?

81%
icon for Will Jim Baird be the Republican nominee for IN-04?

Will Jim Baird be the Republican nominee for IN-04?

89%
icon for Will Mark Tedford be the Republican nominee for OK-01?

Will Mark Tedford be the Republican nominee for OK-01?

42%

Beware of external links.

Frequently Asked Questions

"KY-04 Republican Primary Winner" is a prediction market on Polymarket with 4 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "Thomas Massie" at 73%, followed by "Ed Gallrein" at 29%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 73¢ implies that the market collectively assigns a 73% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

As of today, "KY-04 Republican Primary Winner" has generated $414.2K in total trading volume since the market launched on Dec 1, 2025. This level of trading activity reflects strong engagement from the Polymarket community and helps ensure that the current odds are informed by a deep pool of market participants. You can track live price movements and trade on any outcome directly on this page.

To trade on "KY-04 Republican Primary Winner," browse the 4 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "KY-04 Republican Primary Winner" is "Thomas Massie" at 73%, meaning the market assigns a 73% chance to that outcome. The next closest outcome is "Ed Gallrein" at 29%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "KY-04 Republican Primary Winner" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.