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How many Mexico border seats will Dems win in the house?
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How many Mexico border seats will Dems win in the house?

Oct 20, 2026, 11:14 AM EST - Nov 3, 2026, 11:59 PM EST
Total volume:
$17,178
Volume 24h:
$292
21%
Liquidity:
$41,719
6%
Open interest:
$3,935N/A

9+

 - Polymarket

9+ - Polymarket

1W

News

Positive

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Neutral

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Vol.

·

Resolves Nov 3, 2026

Time left: 01d:07h:11m

Will Democrats win 9 or more of the US House seats bordering Mexico in the 2026 midterm elections?

84%chance
Amount

$

Trade on
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Trade on Polymarket

At 84¢ buys you 119 shares | Odds: 84% Total Payout: $119 | Net Profit: $19 Multiplier: 1.19x | ROI: 19% APY not meaningful
You will be redirected to the platform to complete this trade.
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
polymarket

9+

Trade
84%
Yes 84¢No 17¢
1¢
$12,944
$11,560
3%
254%
N/A
1d 7h 11m
Active
polymarket

7-8

17%
Yes 17¢No 84¢
1¢
$15,675
$2,904
0%
79%
N/A
1d 7h 11m
Active
polymarket

<7

1%
Yes 1.4¢No 99.8¢
1.2¢
$13,099
$2,714
0%
53%
N/A
1d 7h 11m
Active
Total markets: 3

Description

This market will resolve according to the number of the ten US House of Representatives districts listed below that are won by the Democratic Party in the 2026 United States midterm election. The ten districts are Arizona's 6th and 7th Districts, California's 25th and 52nd Districts, New Mexico's 2nd District, and Texas's 15th, 16th, 23rd, 28th, and 34th Districts. All elections for those districts held as part of the 2026 United States midterm election that elect voting members and determine representation in the upcoming 120th congress are included. Special elections to fill a vacancy for the remainder of an unexpired term are not included, whether or not held concurrently with the 2026 United States midterm election. Runoffs for qualifying elections will determine attribution of the relevant seat. A district counts toward the Democratic total if the winning candidate is the nominee of the Democratic Party or has a ballot-listed affiliation with the Democratic Party. A win by any other candidate does not count toward the Democratic total. 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.

Polymarket

This market will resolve according to the number of the ten US House of Representatives districts listed below that are won by the Democratic Party in the 2026 United States midterm election. The ten districts are Arizona's 6th and 7th Districts, California's 25th and 52nd Districts, New Mexico's 2nd District, and Texas's 15th, 16th, 23rd, 28th, and 34th Districts. All elections for those districts held as part of the 2026 United States midterm election that elect voting members and determine representation in the upcoming 120th congress are included. Special elections to fill a vacancy for the remainder of an unexpired term are not included, whether or not held concurrently with the 2026 United States midterm election. Runoffs for qualifying elections will determine attribution of the relevant seat. A district counts toward the Democratic total if the winning candidate is the nominee of the Democratic Party or has a ballot-listed affiliation with the Democratic Party. A win by any other candidate does not count toward the Democratic total. 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.

Frequently asked questions

On Polymarket, the dashboard for the Mexico border seats market tracks the current odds of Democrats winning various numbers of seats along the Mexico border in the House of Representatives. You'll find a price history chart showing how the probabilities have shifted over time, as well as the 24-hour trading volume, currently at $292. The total volume traded on this market is $17,178. This provides a clear picture of where traders are placing their bets and how sentiment is evolving as we approach the election.

On Polymarket, this market is priced through a continuous auction mechanism where traders buy and sell shares representing their belief in different outcomes. The price of a share directly corresponds to the probability of that outcome occurring. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. This means the market price is determined by supply and demand, reflecting the collective wisdom of participants. As new information emerges, traders adjust their positions, causing the prices to fluctuate and providing a real-time assessment of the likely outcome for the number of Mexico border seats Democrats will win.

This market resolves around Nov 4, 2026, with the outcome confirmed once the final seat counts are verifiable from credible public reporting. The resolution will be based on the official results certified by relevant election authorities for the House of Representatives races in districts along the Mexico border. The number of seats won by Democrats in these districts will be the determining factor for settling this market. Traders should monitor official election results as they become available following the election.

Several factors could significantly impact this market. Major economic news, shifts in national polling data, or unexpected developments in key races could all cause traders to reassess their positions. Candidate performance in debates, significant campaign fundraising reports, and any major endorsements could also influence the market. Furthermore, events specific to the Mexico border region, such as changes in immigration policy or border security measures, might shift perceptions of how these districts will vote, causing movement in this market.