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ARBITRAGE_ACTIVE // SPREAD: 98.8% // +$9880.00

Live prediction market odds for Who will be the Republican nominee for FL-19?. Compare prices across Kalshi and Polymarket.

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Kalshi / Polymarket

Who will be the Republican nominee for FL-19?

2026-05-01

About This Market

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Prediction markets on Polymarket and Kalshi are tracking the race for the Republican nominee for FL-19. This election is pivotal as it could influence party dynamics and voter turnout in the upcoming general election.

Jim Oberweis leads the “Who will be the Republican nominee for FL-19” event at 50.1% implied probability. Other contenders include Catalina Lauf (50.0%), Bob Rommel (49.5%), Madison Cawthorn (11.1%), and Spencer Roach (1.9%). A 98.8% cross-platform spread signals an active arbitrage window.

Price History

Multi-Platform Probabilities
Loading 30D data…

Live Markets

2 platforms
JO
Jim OberweisARB
49% Avg
Kalshi13¢
Polymarket92¢
PlatformImplied %Yes — Bid / AskNo — Bid / Ask
KalshiKalshi
9.5%6¢13¢87¢94¢
PolymarketPolymarket
88.5%85¢92¢8¢15¢
CL
Catalina Lauf
50% Avg
Kalshi54¢
Polymarket50¢
PlatformImplied %Yes — Bid / AskNo — Bid / Ask
KalshiKalshi
50.5%47¢54¢46¢53¢
PolymarketPolymarket
49.5%49¢50¢50¢51¢
BR
Bob RommelARB
50% Avg
Kalshi4¢
Polymarket99¢
PlatformImplied %Yes — Bid / AskNo — Bid / Ask
KalshiKalshi
2.0%0¢4¢96¢100¢
PolymarketPolymarket
98.5%98¢99¢1¢2¢
MC
Madison Cawthorn
11% Avg
Kalshi15¢
Polymarket10¢
PlatformImplied %Yes — Bid / AskNo — Bid / Ask
KalshiKalshi
12.5%10¢15¢85¢90¢
PolymarketPolymarket
10.0%10¢10¢90¢90¢
SR
Spencer Roach
2% Avg
Kalshi5¢
Polymarket4¢
PlatformImplied %Yes — Bid / AskNo — Bid / Ask
KalshiKalshi
2.5%0¢5¢95¢100¢
PolymarketPolymarket
2.0%0¢4¢97¢100¢

Candidate Spotlight

About Jim Oberweis

Jim Oberweis is a Republican candidate for Florida's 19th Congressional District in the 2026 election. He served as a member of the Illinois State Senate from 2013 to 2021. His candidacy is relevant to this prediction market as he is actively campaigning for the Republican nomination in FL-19.

About Catalina Lauf

Catalina Lauf is the founder and executive director of Defense of Freedom PAC. She previously served as a special advisor in the U.S. Department of Commerce during the Trump Administration. She is relevant to this prediction market as a potential candidate for the Republican nomination in Florida's 19th Congressional District.

About Madison Cawthorn

Madison Cawthorn is a Republican politician running for Florida's 19th Congressional District in the 2026 elections. He previously served as the U.S. Representative for North Carolina's 11th district from 2021 to 2023. His candidacy is relevant to this prediction market as he is a declared candidate in the Republican primary for FL-19.

Frequently Asked Questions

What factors influence the odds for the Republican nominee in FL-19?

Factors include candidate popularity, fundraising capabilities, and endorsements. Polling data and voter sentiment also play critical roles in shaping market expectations.

How does the Republican nomination process work in Florida?

Florida's Republican primary typically involves a winner-takes-all approach, where the candidate with the most votes secures all delegates. This system heightens competition among candidates as they vie for maximum voter support.

What is the significance of the FL-19 seat in the broader election context?

FL-19 is considered a key district that could sway control in the House of Representatives. Winning this seat may provide the Republican Party with a strategic advantage in legislative initiatives.

What is "Who will be the Republican nominee for FL-19?" and why does it matter?

Who will be the Republican nominee for FL-19 is a prediction market event currently tracked across 2 platforms (Kalshi, Polymarket). Jim Oberweis leads at 50% implied probability, making it the market favorite. Other contenders include Catalina Lauf at 50%, Bob Rommel at 50%, Madison Cawthorn at 11%.

What is moving the odds on "Who will be the Republican nominee for FL-19?"?

Jim Oberweis currently leads at 50% implied probability. Behind Jim Oberweis, Catalina Lauf at 50% and Bob Rommel at 50% and Madison Cawthorn at 11% are the next closest contenders. The 98.8% cross-platform spread suggested platforms were pricing new information differently, creating potential trading opportunities.

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Resolution Oracles

KalshiKalshi
Democratic PartyRepublican Party
PolymarketPolymarket
UMA Optimistic Oraclernc.orgConsensus of Sources
Read Full Market Rulebooks
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Market Rulebook: Who will be the Republican nominee for FL-19?

Official settlement criteria, resolution sources, and edge cases across Kalshi and Polymarket.

KalshiKalshi
Primary Rule

If Madison Cawthorn wins the nomination for the Republican Party to contest the 2026 FL-19 House seat, then the market resolves to Yes.

Resolution Oracles
Democratic PartyRepublican Party
PolymarketPolymarket
Primary Rule

This market will resolve according to the candidate who wins the nomination for the Republican Party to contest the FL-19 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The Republican primary will take place on August 18, 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.

Resolution Oracles
UMA Optimistic Oraclernc.orgConsensus of Sources
Learn more:How to Read Prediction Market PricesCompare Fees Before You TradeNew to Polymarket?

About Spencer Roach

Spencer Roach is a former member of the Florida House of Representatives, having served District 76 from 2018 to 2024. Prior to his legislative career, he served as a judge advocate in the U.S. Coast Guard from 1996 to 2016. His decision not to seek re-election in 2024 has opened the field for new candidates in the upcoming FL-19 Republican primary.
98.8%
Platforms2
Candidates5
Leader

Jim Oberweis

50.1% avg