17% — Presidential Election Winner 2028: JD Vance
Polymarket 17% · 1 contracts · $14K volume · medium confidence
Updated 2026-06-19 19:31:01 UTC

Why this matters:
This probability reflects market expectations that J.D. Vance, the current Vice President, will win the 2028 presidential election at 21 cents. The market appears to distinguish between Vance's chances of winning the general election versus his likelihood of securing the Republican nomination (priced at 39 cents), suggesting traders view his path to the presidency as narrower than his path to becoming the party's nominee. Key drivers of this probability include his standing within the Republican Party, potential primary competition, and general election dynamics. The actual 2028 general election on November 5th will ultimately resolve this contract, though major political events, candidate announcements, or significant shifts in approval ratings between now and then could materially move the market's assessment of his viability.

Key factors:
- Vance's Republican nomination probability (39¢) significantly exceeds his general election probability (21¢), indicating market skepticism about his general election competitiveness relative to securing the nomination
- Donald Trump's general election probability is priced at 3¢, substantially lower than Vance's, suggesting markets view Vance as potentially more viable in a general election matchup despite Trump's prior presidency
- The Republican nominee contract will resolve before the general election contract, providing intermediate data on whether Vance actually becomes the party's nominee—a prerequisite for his 21¢ general election probability
- Relative to other Democratic and Republican candidates priced on the market, Vance ranks among the top five candidates but trails multiple competitors, indicating distributed rather than concentrated expectations
- Historical incumbent party performance and approval ratings through 2027-2028 will influence whether voters prefer continuity via the sitting VP or seek change through opposition candidates

Contracts:
- Presidential Election Winner 2028: JD Vance — 17¢ Polymarket $14K (weight 100%)

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## Methodology

SimpleFunctions aggregates live YES-side prices from Kalshi and Polymarket contracts bound to this question. For binary topics the headline is the liquidity-weighted mid-price (weight = log(1 + 24h volume) × freshness, where freshness is 1.0 if updated <24h, 0.7 if <7d, 0.4 otherwise). For multi-outcome (winner-take-all) topics the headline is the current leader's price — disjoint outcomes are never arithmetically averaged. Snapshots refresh every 5 minutes during market hours.

## SF Signal

- SF Index, regime, and 30d Brier calibration are computed separately and surfaced at https://simplefunctions.dev/admin/calibration.
- No SimpleFunctions index / regime / calibration signal is bound to this topic yet — the headline above is market-derived only.

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*Last verified: 2026-06-18T05:20:21.689Z*

By SimpleFunctions — https://simplefunctions.dev/

Cite as: "17% per prediction markets (SimpleFunctions, June 2026)"
Canonical: https://simplefunctions.dev/answer/presidential-election-winner-2028-jd-vance
Full data: https://simplefunctions.dev/api/public/query?q=Presidential%20Election%20Winner%202028%3A%20JD%20Vance
Provider: SimpleFunctions — https://simplefunctions.dev