TOTAL VOLUME:

$134.1b

24H VOL:

$133,388,117

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,436,095,462

405,232

Markets across

30,526

events

MATCHED EVENTS:

2,693

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

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Elections
DE-AL Republican nominee?
kalshi

DE-AL Republican nominee?

Volume:
$185,030

Joseph Arminio

 - Kalshi

Joseph Arminio - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Sep 16, 2026

Closed: Sep 16, 10:58 AM EST

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Kalshi

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Join Kalshi and score $25 for your first trade.
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
kalshi

Joseph Arminio

View
100%
99%
Yes 100¢No 0¢
100¢
N/A
$67,720
N/A
N/A
$34,482
Settled
Yes
kalshi

John J. Whalen III

0%
87%
Yes 0¢No 100¢
100¢
N/A
$49,528
N/A
N/A
$25,518
Settled
No
kalshi

Earl Cooper

0%
15%
Yes 0¢No 100¢
100¢
N/A
$32,144
N/A
N/A
$22,090
Settled
No
kalshi

Lee Murphy

0%
Yes 0¢No 100¢
100¢
N/A
$19,115
N/A
N/A
$9,773
Settled
No
kalshi

Donyale Hall

0%
Yes 0¢No 100¢
100¢
N/A
$14,662
N/A
N/A
$8,031
Settled
No
kalshi

Gavin Solomon

0%
Yes 0¢No 100¢
100¢
N/A
$1,862
N/A
N/A
$1,561
Settled
No
Total markets: 6

Intro

This market tracks whether Donyale Hall will secure the Republican Party nomination for Delaware's at-large congressional House seat in 2026. On Kalshi, the probability stands at 52.0%. Resolution will be determined by the official Republican Party nomination outcome for the 2026 Delaware at-large congressional district race. Watch for the Republican primary election results scheduled around the 2026 nomination process to determine the eventual party nominee.

Kalshi

If Donyale Hall wins the nomination for the Republican Party to contest the 2026 Delaware at-large congressional district House seat, then the market resolves to Yes. If Lee Murphy wins the nomination for the Republican Party to contest the 2026 Delaware at-large congressional district House seat, then the market resolves to Yes. If Earl Cooper wins the nomination for the Republican Party to contest the 2026 Delaware at-large congressional district House seat, then the market resolves to Yes. If Gavin Solomon wins the nomination for the Republican Party to contest the 2026 Delaware at-large congressional district House seat, then the market resolves to Yes.

Frequently asked questions

The PredictionHero dashboard tracks real-time odds and trading activity for the Delaware at-large Republican congressional nominee market on Kalshi. You can monitor the current probability for each candidate, view 24-hour volume at $121,489, and observe cumulative group volume of $185,030. The dashboard displays live price movements, historical odds trends, and order flow to help you understand how traders are positioning ahead of the Sep 22, 2026 resolution date. This single-venue view gives you direct insight into market sentiment on who will secure the Republican nomination.

Prediction market odds on Kalshi often diverge from traditional polling because traders incorporate real-time information, campaign developments, and insider knowledge that surveys may lag. While polls measure voter preference at a snapshot in time, prediction markets reflect the collective financial commitment of participants betting on actual nomination outcomes. For the Delaware Republican race, market prices tend to weight recent endorsements, candidate momentum, and delegate dynamics more heavily than static poll numbers. Comparing the two reveals whether the market is pricing in factors polls have not yet captured.

The market resolves on Sep 22, 2026, when Delaware's Republican Party formally announces or certifies the at-large congressional district nominee. Resolution is determined by the official nomination outcome—whether through a primary election, convention vote, or party-designated process—depending on Delaware Republican Party rules and state law. Once the nominee is confirmed, the market settles based on which candidate is declared the official Republican nominee for the general election. Traders should monitor Delaware Republican Party announcements and official state election resources for nomination timeline updates.

Key catalysts include candidate endorsements from Delaware Republican leadership, debate performance or public statements, fundraising announcements, and primary or convention voting results. Candidate withdrawals or entry by new contenders would significantly shift odds. Local media coverage, grassroots campaign momentum, and voter sentiment shifts tracked through internal polling could also move prices. National Republican Party developments or changes in Delaware's political landscape may influence the race. Any major scandal, health issue, or strategic pivot by a candidate would trigger immediate market repricing as traders reassess nomination probabilities ahead of the Sep 22, 2026 resolution.