What are the current 2028 US Presidential Election odds on Polymarket, Kalshi, and Limitless?

PredictMarketCap compares 2028 US Presidential Election odds across Polymarket, Kalshi in real time. The leading outcome is J.D. Vance, trading at 21% on Polymarket and 19% on Kalshi. The average cross-platform spread is 0.6pp.

Why do 2028 US Presidential Election odds differ between Polymarket, Kalshi, and Limitless?

Different prediction markets have separate trader bases, fee structures, and liquidity pools. Polymarket is crypto-based and available globally, Kalshi is CFTC-regulated and US-only, and Limitless operates on Base with zero fees. These differences can cause odds to diverge, especially during breaking news when one platform's traders react faster than others.

How much money is being traded on 2028 US Presidential Election?

Across all platforms, $4.51M has been traded on 2028 US Presidential Election markets, with $41.72M in open interest. Polymarket has $4.24M in volume, Kalshi has $265.3K in volume.

Total Active Markets

Count of all non-resolved markets currently tracked across Polymarket, Kalshi, and Limitless.

122,371

Total Volume

Lifetime trading volume across all platforms. Polymarket and Kalshi report volume directly; Limitless volume is cumulative USDC traded.

$5,586,740,888

24h Volume

24-hour trading volume. Polymarket and Kalshi report this directly. Limitless does not break out 24h volume separately, so it is not included.

$475,966,484

Total Open Interest

Polymarket: sum of pool liquidity. Kalshi: open interest (contracts outstanding). Limitless: uses total volume as a proxy — no separate OI metric is available.

$2,691,719,004

Polymarket$2.32BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.

Kalshi$350.67MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.

Limitless$18.48MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.

Total Active Markets

Count of all non-resolved markets currently tracked across Polymarket, Kalshi, and Limitless.

122,371

Total Volume

Lifetime trading volume across all platforms. Polymarket and Kalshi report volume directly; Limitless volume is cumulative USDC traded.

$5,586,740,888

24h Volume

24-hour trading volume. Polymarket and Kalshi report this directly. Limitless does not break out 24h volume separately, so it is not included.

$475,966,484

Total Open Interest

Polymarket: sum of pool liquidity. Kalshi: open interest (contracts outstanding). Limitless: uses total volume as a proxy — no separate OI metric is available.

$2,691,719,004

Polymarket$2.32BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.

Kalshi$350.67MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.

Limitless$18.48MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.

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2028 US Presidential Election: Polymarket vs Kalshi

36 outcomes|2 platforms

Trade on Polymarket Details

Trade on Kalshi Details

Total Volume

$4.51M

Open Interest

$41.72M

Avg Spread

0.6pp

Max Spread

5.6pp

Compare 2028 US Presidential Election prediction market odds side by side across Polymarket, Kalshi. Platforms show similar odds, with an average spread of just 0.6pp. Close agreement often signals strong market consensus. With $4.51M in combined trading volume across 36 outcomes, this is one of the most actively traded cross-platform prediction markets.