KalshiCheck availabilityKYC required2% feeVerified resolution dataFairly calibratedCurrent implied probability
No 97%
Market quality
≤49 / 100
Low quality24h Volume
—
Liquidity
$1.8K
Low liquidityBid / Ask
1.2% / 3.0%
Spread
1.8 pt
Tight spreadMarket data
Updated 3 minutes ago
Mar 22, 25, 2:00 PM UTCJan 20, 29, 3:00 PM UTC
Trends
Related Markets
Related questions for context, not a comparison of equivalent contracts.
Will Section IV of the 25th Amendment be used during Trump's Presidency?
KalshiElon Musk creates political party before Trump presidency ends?
Manifold MarketsWill JD Vance be excommunicated by the Catholic Church during Trump's presidency?
Manifold MarketsWill Joe Biden outlive the Trump Presidency?
Manifold MarketsWho will be the next Supreme Court justice?
KalshiWill the Supreme Court overturn gay marriage?
KalshiRules
If the number of total seats for justices of the Supreme Court of the United States has been expanded or contracted after Issuance and before Jan 20, 2029, then the market resolves to Yes.
Open markets
US Politics
POLYMARKETPresidential Election Winner 2028
- JD Vance-0.1pt25%
- Alexandria Ocasio-Cortez13%
- Jon Ossoff12%
+49 more outcomes
- Total Vol
- $703.9M
- 24h Vol
- $808.4K
POLYMARKETRepublican Presidential Nominee 2028
- J.D. Vance50%
- Marco Rubio-0.1pt20%
- Tucker Carlson3%
+39 more outcomes
- Total Vol
- $701M
POLYMARKETUS announces end of Iranian blockade by which date?
- December 31-2.5pt48.3%
- October 31-2.0pt29.3%
- September 30-4.0pt12.1%
+17 more outcomes
POLYMARKET$LAPTOP FDV above ___ one day after launch?
- $10M+9.8pt96%
- $25M+15.5pt94%
- $50M+31.5pt86%
+4 more outcomes
KALSHIWhich party will win the U.S. House?
- Democratic Party84.2%
- Republican Party-1.0pt15.8%
- Total Vol
- $28.3M
- 24h Vol
- $342.3K
KALSHI2028 Republican presidential nominee
- J.D. Vance44.2%
- Marco Rubio20.2%
- Ron DeSantis+0.1pt4.8%
+35 more outcomes
- Total Vol
- $63.6M
- 24h Vol
- $338.6K
- Democratic Presidential Nominee 2028
- New Hampshire Democratic Senate nominee?
- Clarity Act (H.R.3633) signed into law in 2026?
- Balance of Power: 2026 Midterms
- Prime Minister of Israel after the next election?
- Which party will win the House in 2026?
- Trump renames New Mexico to New America by which date?
- 2026 Midterms: Congress Balance of Power?
- Will the US confirm that aliens exist by which date?
- Rhode Island Democratic Governor nominee?
Frequently asked questions
- What are the current odds for Will the size of the Supreme Court be changed during Trump's Presidency??
- Kalshi prices No at 97% as of September 8, 2026.
- When does Will the size of the Supreme Court be changed during Trump's Presidency? resolve?
- Will the size of the Supreme Court be changed during Trump's Presidency? is scheduled to resolve on January 20, 2029.
- How is Will the size of the Supreme Court be changed during Trump's Presidency? settled?
- Kalshi settles this market as follows: If the number of total seats for justices of the Supreme Court of the United States has been expanded or contracted after Issuance and before Jan 20, 2029, then the market resolves to Yes.