TOTAL VOLUME:

$41.6b

24H VOL:

$113,284,831

24H TRANSACTIONS:

2,858,735,640

OPEN INTEREST:

$1,620,345,032

79,029

Markets across

1,359

events

MATCHED EVENTS:

138

PLATFORM COVERAGE:

4

Polymarket:

45%

VS.

Kalshi:

55%

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Politics
Republican House seats after the 2026 midterm elections?
polymarket
kalshi

Republican House seats after the 2026 midterm elections?

Total volume:
$5,956,420
Volume 24h:
$136,780
89%
Liquidity:
$283,693
19%
Open interest:
$4,174,341
3%

Below 193

 - Kalshi

Below 193 - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolves Feb 1, 2027

Will the Republican Party win 193 seats in the 120th Congress?

38%chance
Amount

$

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kalshi

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Join Kalshi and score $25 for your first trade.At 38¢ buys you 263 shares | Odds: 38% Total Payout: $263 | Net Profit: $163 Multiplier: 2.63x | ROI: 163% High Projected APY: 3,712% 97 days to resolution
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Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
kalshi

Below 193

Trade
38%
Yes 38¢No 63¢
1¢
N/A
$944,016
1%
N/A
$557,217
3mo 1w
active
polymarket

Below 190

36%
Yes 37¢No 66¢
3¢
$41,543
$61,668
0.91%
N/A
N/A
1w 18h
active
kalshi

198-202

17%
Yes 16¢No 85¢
1¢
N/A
$302,189
3%
N/A
$223,182
3mo 1w
active
kalshi

193-197

16%
Yes 16¢No 85¢
1¢
N/A
$370,182
0.72%
N/A
$259,572
3mo 1w
active
polymarket

205-209

14%
5%
Yes 15.8¢No 87.9¢
3.7¢
$34,440
$47,992
0.65%
N/A
N/A
1w 18h
active
polymarket

200-204

13%
2%
Yes 12.6¢No 87.5¢
0.1¢
$24,858
$29,776
1%
N/A
N/A
1w 18h
active
polymarket

195-199

12%
1%
Yes 13¢No 89¢
2¢
$25,803
$38,333
0.59%
N/A
N/A
1w 18h
active
polymarket

190-194

11%
Yes 11¢No 90¢
1¢
$25,966
$20,270
2%
N/A
N/A
1w 18h
active
kalshi

203-207

10%
Yes 9¢No 93.8¢
2.8¢
N/A
$320,165
4%
N/A
$272,900
3mo 1w
active
polymarket

215-219

8%
2%
Yes 11.6¢No 95.7¢
7.3¢
$15,913
$15,060
12%
N/A
N/A
1w 18h
active
kalshi

208-212

7%
Yes 6.9¢No 94¢
0.9¢
N/A
$308,282
10%
N/A
$246,297
3mo 1w
active
kalshi

218-222

6%
1%
Yes 6.2¢No 94.2¢
0.4¢
N/A
$741,972
2%
N/A
$547,876
3mo 1w
active
polymarket

210-214

6%
Yes 7.7¢No 96.5¢
4.2¢
$26,338
$18,991
0.92%
N/A
N/A
1w 18h
active
polymarket

220-224

5%
2%
Yes 7.4¢No 96.6¢
4¢
$33,880
$63,377
3%
N/A
N/A
1w 18h
active
kalshi

213-217

4%
Yes 4.2¢No 96.9¢
1.1¢
N/A
$382,840
7%
N/A
$286,393
3mo 1w
active
kalshi

223-227

3%
Yes 3¢No 97.3¢
0.3¢
N/A
$654,273
0.13%
N/A
$509,111
3mo 1w
active
polymarket

225-229

2%
Yes 3.2¢No 99¢
2.2¢
$24,817
$26,774
0.72%
N/A
N/A
1w 18h
active
kalshi

228-232

2%
1%
Yes 1.9¢No 99¢
0.9¢
N/A
$593,559
5%
N/A
$426,800
3mo 1w
active
kalshi

Above 237

2%
Yes 1.6¢No 98.6¢
0.2¢
N/A
$513,337
0.2%
N/A
$454,949
3mo 1w
active
kalshi

233-237

1%
Yes 1.1¢No 99.1¢
0.2¢
N/A
$470,106
1%
N/A
$390,046
3mo 1w
active
polymarket

230+

0%
Yes 0.6¢No 99.8¢
0.4¢
$30,135
$33,259
0.42%
N/A
N/A
1w 18h
active
Total markets: 21

Description

This group forecasts the number of seats the Republican Party will hold in the U.S. House of Representatives following the 2026 midterm elections. The markets cover a range of possible seat counts, from below 190 to 230 or more. Resolution will be based on official election results and reporting.

PredictionHero - Resolution Divergence Alerts (RDA)

Divergence Detected

Issue: Kalshi uses a delayed snapshot date (February 1, 2027) while Polymarket resolves based on the immediate election results. Thresholds also differ slightly between platforms.Hero tip: Consider the potential for post-election changes (resignations, party switches) when trading Kalshi markets. Polymarket markets will likely resolve faster and reflect the initial election outcome more directly.

Critical divergence points:

  • Polymarket: Resolves based on the final seat count determined by official election results and credible reporting, attributing seats based on the party affiliation at the time of election. "If a member-elect changes party affiliation, or vacates their seat, between election day and the formal organization of Congress, the seat is attributed to the party under which the member was elected."
  • Kalshi: Resolves based on the Republican Party’s seat count as of February 1, 2027. This introduces a delay and allows for potential changes after the election. "If the Republican Party has below 193 House seats on Feb 1, 2027, then the market resolves to Yes."
Our PredictionHero Resolution Divergence Alerts (RDA) are there to help users identify potential differences across platforms. They do not replace or supersede the official rules and description of any prediction market. Users are solely responsible for reviewing and understanding the applicable rules and resolution criteria before placing any trade or bet. If you notice a potential inconsistency, discrepancy, or error in an alert, please report it to our team so we can review and improve the accuracy of our data.

Polymarket

This market will resolve according to the Republican Party’s seat count in the U.S. House of Representatives as a result of the 2026 United States midterm election scheduled for November 3, 2026. The seat count includes all House elections in the 2026 United States midterm election that elect voting members and determine representation in the upcoming 120th Congress. Where a seat is decided by a runoff, the runoff result will determine attribution of that seat. Seats are attributed to the party under which the member was elected. If a member-elect changes party affiliation, or vacates their seat, between election day and the formal organization of Congress, the seat is attributed to the party under which the member was elected. House members elected as independents who formally caucus with, or, for newly elected members, who announce their intent to caucus with, the Republican party are included in the count. If the caucus decisions of members of the House elected as independents cannot be determined on the date of the election, this market may remain open until the earlier of (i) an announcement from the relevant members of their intents to caucus, or (ii) January 4th, 11:59 PM ET of the following calendar year. If no such announcement is made by January 4th, 11:59 PM ET of the following calendar year, the member will not count towards the seat count of any party. The resolution sources for this market will be official information from relevant state electoral authorities, the United States Congress, and a consensus of credible reporting.

Kalshi

Republican House seat totals are measured on February 1, 2027, with outcomes segmented into ranges: below 193, 193-197, 198-202, 203-207, 208-212, 213-217, 218-222, 223-227, 228-232, 233-237, and above 237 seats. Individuals caucusing with the Republican Party are included in the count. Each outcome range resolves to Yes if the Republican Party holds a number of seats within that specific range on the resolution date.