Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via PolyGram) Pick polygram.ink (preferred broker) |
51% | 49% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open the market → |
Polymarket (direct) polymarket.com |
51% | 49% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open the market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open the market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open the market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open the market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| September 30? | 51% |
| August 30? | 38% |
| August 9? | 16% |
Market context
Polymarket has this contract at **24% YES**, so traders are paying roughly a one-in-four chance that Max Miller formally exits the OH-07 race before the settlement deadline. The market is priced on **USDC on Polygon** through conditional tokens, so the practical question is not whether the seat is competitive, but whether there is an official withdrawal, campaign suspension, or equivalent statement from Miller or his authorised representatives before 11:59 PM ET on 9 August 2026.
That 24% sits below the intensity of the current headlines, which matters because comparable cases often see sharp but short-lived repricings when pressure spikes without an actual filing or announcement. Miller has publicly denied he is dropping out and has said he will remain in the race, while reporting over the past week has highlighted mounting Republican pressure, ballot-deadline timing, and the threat that local party officials may need to move quickly if a replacement is to be nominated.[2][8][9][12] In other words, traders are weighing a real political crisis against the fact that incumbents often absorb pressure right up to the procedural cutoff without actually leaving.
The main catalysts now are any direct Miller statement, a post on his official channels, or a formal move by party officials that implies withdrawal; absent that, the market can drift back towards No as the deadline passes. Recent coverage from The New York Times said Miller still intended to inject $1 million into his campaign, while also noting Ohio officials’ replacement timing constraints and uncertainty around the exact practical cutoff.[12] For Polymarket users, that means the contract should be read as a live event-driven bet on official confirmation, not just on whether he remains under scrutiny or looks vulnerable in the district.
Methodology
Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.
Resolution & payout
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
FAQ
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- How fast are USDC deposits?
- Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.
- Do I need to KYC for this market?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
- How reliable are the quoted odds?
- The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.
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