Trump out as President by August 31?

Platform comparison

Market context

Donald Trump leaving office before the end of August would be an abrupt constitutional event, and the market currently prices that risk at just **1%** on Polymarket, which implies a very low chance of a resignation, removal, or other permanent cessation before the deadline.[1] The contract is unusually sensitive to an *announcement* as well as the actual exit: a public statement of resignation or removal would settle it to Yes immediately, even if the effective date came later.[1]

Historical comparables suggest the right base rate is extremely small. Modern presidential departures before the natural end of a term are rare and usually require either a voluntary resignation, death, or a formal removal process; even the closest analogue in recent US history, Richard Nixon’s resignation, came after an escalating political collapse rather than a routine transition. That is why a sub-5% market price is generally read as a tail-risk instrument rather than a forecast of a near-term change in office. On Polymarket, the quote is shown directly as an implied probability, whereas Kalshi and some bookmaker-style venues more often present decimal-style pricing or standardised “odds” views, with fees and user access varying by platform; Polymarket’s crypto-native model is typically lighter on identity checks, while regulated books such as Kalshi, Betfair, and Smarkets tend to impose stricter KYC and jurisdictional limits.

For traders, the main catalysts are White House announcements, sudden health disclosures, legal or impeachment developments, and any formal statement about permanent incapacity or departure. Reuters reported in July 2026 that Trump’s administration was still dealing with a steady stream of high-profile political and legal headlines, which matters because this kind of market tends to reprice on fast-moving confirmation rather than on background speculation.[2] The key comparison across venues is that a one-cent Polymarket Yes quote already encodes the same kind of low probability that would be shown as roughly 1.01 on decimal-odds books, but the realised value depends on each platform’s fee structure, settlement rules, and whether the trader can access the market at all.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Trump out as President by August 31? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Alternative, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Polymarket Alternative offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.