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icon for Dems' best tossup Senate race?

Dems' best tossup Senate race?

icon for Dems' best tossup Senate race?

Dems' best tossup Senate race?

Michigan 55%

Alaska 21%

Maine 16%

Iowa 5.2%

Polymarket
NEW

Michigan 55%

Alaska 21%

Maine 16%

Iowa 5.2%

Polymarket
NEW
icon for Michigan

Michigan

$2,634 Vol.

55%

icon for Alaska

Alaska

$201 Vol.

21%

icon for Maine

Maine

$195 Vol.

16%

icon for Iowa

Iowa

$109 Vol.

5%

icon for Texas

Texas

$114 Vol.

5%

icon for Ohio

Ohio

$273 Vol.

4%

The 2026 midterm elections are scheduled to be held on November 3, 2026. This market will resolve according to the state, out of those listed, in which the Democratic Senate candidate earns the highest vote share percentage in the midterm election. Vote share percentages will be determined by dividing the total number of valid votes for each candidate by the sum of all valid votes cast in the election. For elections that include runoffs, ranked-choice, or other multi-round elections, the relevant vote share will be that of the last-reported round containing a Democrat, and only non-exhausted ballots will be considered to be valid in that round. In the event that such a round contains multiple Democrats, this market will resolve in favor of the Democrat with the higher vote share. If two vote shares are identical, this market will rank the tied states in alphabetical order. In the event that the relevant vote share for a state cannot be determined by March 31, 2027, that state will not be considered for purposes of this market. The resolution source for this market will be a compilation of all of the relevant state election authorities responsible for certifying statewide elections, however, a consensus of credible reporting may also be used.Michigan stands out as the leading outcome because it is the sole Democratic-held open seat rated a toss-up by multiple forecasters, set in a narrow swing state where recent presidential margins have been under two points. Democratic nominee Abdul El-Sayed, who prevailed in the August primary, faces Republican Mike Rogers in polling that has remained close, with several surveys showing single-digit leads either way. In contrast, Alaska, Maine, Ohio, Iowa, and Texas represent Republican-held seats where Democrats must overcome structural leans through candidates like Mary Peltola and Sherrod Brown, though recent Cook Political Report shifts have expanded the overall battlefield. Trader consensus reflects Michigan’s defensive advantage and the relative difficulty of pickups elsewhere ahead of November.

The 2026 midterm elections are scheduled to be held on November 3, 2026.

This market will resolve according to the state, out of those listed, in which the Democratic Senate candidate earns the highest vote share percentage in the midterm election.

Vote share percentages will be determined by dividing the total number of valid votes for each candidate by the sum of all valid votes cast in the election.

For elections that include runoffs, ranked-choice, or other multi-round elections, the relevant vote share will be that of the last-reported round containing a Democrat, and only non-exhausted ballots will be considered to be valid in that round. In the event that such a round contains multiple Democrats, this market will resolve in favor of the Democrat with the higher vote share.

If two vote shares are identical, this market will rank the tied states in alphabetical order.

In the event that the relevant vote share for a state cannot be determined by March 31, 2027, that state will not be considered for purposes of this market.

The resolution source for this market will be a compilation of all of the relevant state election authorities responsible for certifying statewide elections, however, a consensus of credible reporting may also be used.
The 2026 midterm elections are scheduled to be held on November 3, 2026. This market will resolve according to the state, out of those listed, in which the Democratic Senate candidate earns the highest vote share percentage in the midterm election. Vote share percentages will be determined by dividing the total number of valid votes for each candidate by the sum of all valid votes cast in the election. For elections that include runoffs, ranked-choice, or other multi-round elections, the relevant vote share will be that of the last-reported round containing a Democrat, and only non-exhausted ballots will be considered to be valid in that round. In the event that such a round contains multiple Democrats, this market will resolve in favor of the Democrat with the higher vote share. If two vote shares are identical, this market will rank the tied states in alphabetical order. In the event that the relevant vote share for a state cannot be determined by March 31, 2027, that state will not be considered for purposes of this market. The resolution source for this market will be a compilation of all of the relevant state election authorities responsible for certifying statewide elections, however, a consensus of credible reporting may also be used.
Volume
$3,526
End Date
Nov 3, 2026
Market Opened
Sep 2, 2026, 1:44 PM ET
The 2026 midterm elections are scheduled to be held on November 3, 2026. This market will resolve according to the state, out of those listed, in which the Democratic Senate candidate earns the highest vote share percentage in the midterm election. Vote share percentages will be determined by dividing the total number of valid votes for each candidate by the sum of all valid votes cast in the election. For elections that include runoffs, ranked-choice, or other multi-round elections, the relevant vote share will be that of the last-reported round containing a Democrat, and only non-exhausted ballots will be considered to be valid in that round. In the event that such a round contains multiple Democrats, this market will resolve in favor of the Democrat with the higher vote share. If two vote shares are identical, this market will rank the tied states in alphabetical order. In the event that the relevant vote share for a state cannot be determined by March 31, 2027, that state will not be considered for purposes of this market. The resolution source for this market will be a compilation of all of the relevant state election authorities responsible for certifying statewide elections, however, a consensus of credible reporting may also be used.Michigan stands out as the leading outcome because it is the sole Democratic-held open seat rated a toss-up by multiple forecasters, set in a narrow swing state where recent presidential margins have been under two points. Democratic nominee Abdul El-Sayed, who prevailed in the August primary, faces Republican Mike Rogers in polling that has remained close, with several surveys showing single-digit leads either way. In contrast, Alaska, Maine, Ohio, Iowa, and Texas represent Republican-held seats where Democrats must overcome structural leans through candidates like Mary Peltola and Sherrod Brown, though recent Cook Political Report shifts have expanded the overall battlefield. Trader consensus reflects Michigan’s defensive advantage and the relative difficulty of pickups elsewhere ahead of November.

The 2026 midterm elections are scheduled to be held on November 3, 2026.

This market will resolve according to the state, out of those listed, in which the Democratic Senate candidate earns the highest vote share percentage in the midterm election.

Vote share percentages will be determined by dividing the total number of valid votes for each candidate by the sum of all valid votes cast in the election.

For elections that include runoffs, ranked-choice, or other multi-round elections, the relevant vote share will be that of the last-reported round containing a Democrat, and only non-exhausted ballots will be considered to be valid in that round. In the event that such a round contains multiple Democrats, this market will resolve in favor of the Democrat with the higher vote share.

If two vote shares are identical, this market will rank the tied states in alphabetical order.

In the event that the relevant vote share for a state cannot be determined by March 31, 2027, that state will not be considered for purposes of this market.

The resolution source for this market will be a compilation of all of the relevant state election authorities responsible for certifying statewide elections, however, a consensus of credible reporting may also be used.
The 2026 midterm elections are scheduled to be held on November 3, 2026. This market will resolve according to the state, out of those listed, in which the Democratic Senate candidate earns the highest vote share percentage in the midterm election. Vote share percentages will be determined by dividing the total number of valid votes for each candidate by the sum of all valid votes cast in the election. For elections that include runoffs, ranked-choice, or other multi-round elections, the relevant vote share will be that of the last-reported round containing a Democrat, and only non-exhausted ballots will be considered to be valid in that round. In the event that such a round contains multiple Democrats, this market will resolve in favor of the Democrat with the higher vote share. If two vote shares are identical, this market will rank the tied states in alphabetical order. In the event that the relevant vote share for a state cannot be determined by March 31, 2027, that state will not be considered for purposes of this market. The resolution source for this market will be a compilation of all of the relevant state election authorities responsible for certifying statewide elections, however, a consensus of credible reporting may also be used.
Volume
$3,526
End Date
Nov 3, 2026
Market Opened
Sep 2, 2026, 1:44 PM ET

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Frequently Asked Questions

"Dems' best tossup Senate race?" is a prediction market on Polymarket with 6 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "Michigan" at 55%, followed by "Alaska" at 21%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 55¢ implies that the market collectively assigns a 55% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

"Dems' best tossup Senate race?" is a newly created market on Polymarket, launched on Sep 2, 2026. As an early market, this is your opportunity to be among the first traders to set the odds and establish the market's initial price signals. You can also bookmark this page to track volume and trading activity as the market gains traction over time.

To trade on "Dems' best tossup Senate race?," browse the 6 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "Dems' best tossup Senate race?" is "Michigan" at 55%, meaning the market assigns a 55% chance to that outcome. The next closest outcome is "Alaska" at 21%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "Dems' best tossup Senate race?" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.