HI-01 Democratic Primary Winner

Platform comparison

Market context

The race for Hawai‘i’s 1st Congressional District Democratic nomination has been running as a two-horse contest between incumbent Ed Case and state senator Jarrett Keohokalole, with the primary on 8 August 2026 and the market resolving to the candidate formally nominated by official Democratic sources. Recent polling and market data have not pointed to a decisive runaway: one poll aggregate cited by Prediction Edge gave Case 39.8%, Keohokalole 27.3% and Della Au Belatti 21.0%, while live odds there still had Case narrowly ahead of Keohokalole. [2]

That mix resembles prior Hawai‘i primaries where the incumbent’s organisational edge matters, but late movement can still tighten the gap when turnout is low and the electorate is split across O‘ahu. In 2024, Case won the district’s Democratic primary comfortably, which is one reason models often start from an incumbent-favourable baseline; however, the present market is still pricing in uncertainty because the field included multiple Democrats and late consolidation has not been fully reflected in a single definitive public poll. [6][11][3]

The main catalysts are official results, any last-minute candidate withdrawals or endorsements, and whether campaign-finance disclosures confirm one side’s cash advantage translating into turnout effort. Federal filings as of 19 July showed Case with about $599,649 cash on hand versus Keohokalole’s $81,387, a funding gap that supports the incumbent case, while local reporting and polling coverage have kept attention on whether Keohokalole can convert progressive interest into votes before ballots are counted. The market is leaning most heavily on the polling trend plus finance strength rather than on any announced debate schedule or convention event. [5][2][3]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for HI-01 Democratic Primary Winner plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

UK Frequently Asked Questions

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.

How fast do political markets react to news?

High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.

Are UK election prediction markets available from the UK?

Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.