Incumbent Rep. Thomas Massie holds a trader consensus lead at 66.5% implied probability to win Kentucky's 4th District Republican primary on May 19, buoyed by his decade-plus tenure, strong local name recognition, and consistent primary victories in the solidly conservative district. Recent polls reflect a tightening race: Big Data Poll (April 3-7) showed Massie at 52.4% over Trump-endorsed challenger Ed Gallrein at 47.6%, while Quantus Insights (April 6-7) had Massie at 46.8% to Gallrein's 37.7% with undecideds. President Trump's rally and repeated criticisms of Massie have fueled Gallrein's 32.3% share, testing endorsement power against incumbency, as minor candidates Nicole Lee Ethington and Robert Wells Jr. register negligible support.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedThomas Massie 67%
Ed Gallrein 32.3%
Nicole Lee Ethington <1%
Robert Wells Jr. <1%
$218,401 Vol.
$218,401 Vol.
Thomas Massie
67%
Ed Gallrein
32%
Nicole Lee Ethington
<1%
Robert Wells Jr.
<1%
Thomas Massie 67%
Ed Gallrein 32.3%
Nicole Lee Ethington <1%
Robert Wells Jr. <1%
$218,401 Vol.
$218,401 Vol.
Thomas Massie
67%
Ed Gallrein
32%
Nicole Lee Ethington
<1%
Robert Wells Jr.
<1%
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.
Market Opened: Dec 1, 2025, 4:51 PM ET
Resolver
0x2F5e3684c...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.
Resolver
0x2F5e3684c...Incumbent Rep. Thomas Massie holds a trader consensus lead at 66.5% implied probability to win Kentucky's 4th District Republican primary on May 19, buoyed by his decade-plus tenure, strong local name recognition, and consistent primary victories in the solidly conservative district. Recent polls reflect a tightening race: Big Data Poll (April 3-7) showed Massie at 52.4% over Trump-endorsed challenger Ed Gallrein at 47.6%, while Quantus Insights (April 6-7) had Massie at 46.8% to Gallrein's 37.7% with undecideds. President Trump's rally and repeated criticisms of Massie have fueled Gallrein's 32.3% share, testing endorsement power against incumbency, as minor candidates Nicole Lee Ethington and Robert Wells Jr. register negligible support.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated


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