TOTAL VOLUME:

$134.2b

24H VOL:

$126,324,530

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,434,646,834

406,019

Markets across

30,401

events

MATCHED EVENTS:

2,689

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

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MD-01 Republican nominee?
kalshi

MD-01 Republican nominee?

Volume:
$13,847

Andy Harris

 - Kalshi

Andy Harris - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Jun 24, 2026

Closed: Jun 23, 8:33 PM EST

kalshi

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

Andy Harris

View
100%
Yes 100¢No 0¢
100¢
N/A
$6,617
N/A
N/A
$1,908
1mo 4d
Yes
kalshi

Chris Bruneau

0%
Yes 0¢No 100¢
100¢
N/A
$7,230
N/A
N/A
$2,980
1mo 4d
No
Total markets: 2

Intro

This market tracks which candidate will secure the Republican Party nomination for Maryland's 1st congressional district House seat in 2026. On Kalshi, Andy Harris holds 94.0% probability of winning the nomination, while Chris Bruneau stands at 3.0%. The market resolves based on which candidate officially wins the Republican nomination as determined by party processes. Watch the Maryland Republican primary calendar and candidate filing deadlines leading up to the November 3, 2026 general election date.

Kalshi

If Andy Harris wins the nomination for the Republican Party to contest the 2026 MD-01 House seat, then the market resolves to Yes. If Chris Bruneau wins the nomination for the Republican Party to contest the 2026 MD-01 House seat, then the market resolves to Yes.

Frequently asked questions

The MD-01 Republican nominee dashboard on Kalshi tracks real-time odds and historical price movements for the Republican primary race in Maryland's 1st Congressional District. You can monitor the current implied probability of each candidate becoming the GOP nominee, view 24-hour trading volume of $0, and analyze cumulative market activity totaling $13,847. The dashboard displays live bid-ask spreads, trade history, and probability shifts as new information emerges. This centralized view helps traders and political observers gauge market consensus on candidate viability throughout the campaign cycle leading up to the general election.

Prediction market odds on Kalshi often diverge from traditional polling because markets incorporate trader expectations, fundraising data, endorsements, and real-time campaign momentum. While polls capture voter sentiment at a single moment, prediction markets aggregate continuous information flow and financial incentives for accuracy. The MD-01 Republican nominee market reflects traders' beliefs about which candidate will ultimately secure the nomination, potentially leading the market to price in frontrunners more aggressively than polls suggest. Comparing the two reveals whether the market is more bullish or bearish on specific candidates relative to survey data.

The MD-01 Republican nominee market resolves on Nov 3, 2026. Resolution is determined by the official outcome of the Republican primary election or nomination process in Maryland's 1st Congressional District. The market will settle based on which candidate is officially designated as the Republican nominee for the general election. Traders should monitor primary election dates, party convention rules, and official certification of results to understand the exact resolution criteria and timing.

Key catalysts for price movement include candidate endorsements from national or state Republican leaders, campaign funding announcements and spending reports, debate performances, polling releases, primary election results from neighboring districts, candidate withdrawals or entries, media coverage of scandals or gaffes, and grassroots organizing developments. Local economic news affecting the district, shifts in national Republican priorities, and changes to the primary calendar can also influence trader sentiment. Major political events, such as shifts in party leadership or unexpected candidate momentum, may rapidly reprrice the market as traders reassess nomination probabilities.