TN-05 Republican Primary Winner

Platform comparison

Market context

The Republican nominee for Tennessee’s 5th Congressional District will be chosen in the primary on 6 August 2026, and the market resolves on the official Republican nominee rather than any later replacement on the ballot. In programme terms, the key state variable is the nomination decision itself: if your tooling ingests live odds, the market can be treated as a single binary event with a fixed deadline, while any post-primary candidate substitution is operationally irrelevant to settlement.

The current 100% crowd-implied probability is inconsistent with the live trading data available elsewhere, where Polymarket shows Andy Ogles at 58% and Charlie Hatcher at 41%, and Kalshi shows Ogles at 88% with Hatcher at 16% and Patrick Smith at 2%. That gap matters for users who model spreads or run conditional orders, because it suggests either stale pricing, a data-feed issue, or that the market has already effectively detached from consensus by the time you are reading it. Axios reported on 20 July that Ogles’ lead had narrowed from earlier highs, with Kalshi moving from 94% for Ogles in May to 64% and 38% for Hatcher by mid-July, which is the kind of drift automated traders typically use as a signal to reassess exposure.

The practical catalysts to watch are filing changes, endorsements, campaign withdrawals, and any official Republican announcements from the state party or RNC-linked sources, because settlement depends on the recognised nominee, not on unofficial calls. For a programmatic approach, the useful checks are candidate roster updates, primary calendar changes, and fresh odds across venues, since the fastest moves often come from new polling or reporting rather than from election day itself.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track TN-05 Republican Primary Winner across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Review UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.