The TX-12 House Election Margin of Victory contract on Polymarket is tied to the 2026 U.S. House election in Texas's 12th congressional district. Its rules say the market resolves according to the margin of victory between the top two candidates in that election [1]. The rules define the margin as "the absolute difference between the percentages of valid votes received by the first-place and second-place candidates." Each percentage is found by dividing a top-two candidate's valid votes by the sum of all valid votes cast in the election [1]. The contract therefore measures the gap between the two leading vote shares, not the total number of votes or turnout. The market's party options are narrowly defined. Candidates nominated by the Democratic and Republican Parties represent the "Democrat" and "Republican" options, and independent candidates do not represent either option [1]. Candidate names may appear in the contract for convenience. If a named candidate is replaced as a party's nominee before election day, the contract name is updated and the market resolves based on the replacement nominee [1]. The margin brackets have specific edge rules. If the reported value falls exactly between two brackets, the market resolves to the higher margin bracket [1]. If two or more candidates tie for the most valid votes, the rules set out a tiebreaking method that uses ballot-listed last names and specify outcomes when the tie involves unlisted candidates. In a tie between two or more unlisted candidates, the market resolves to "Other" [1]. Resolution depends on the official result. The market resolves on the official vote count once it has been made official [1]. The primary source is the official results published by the state electoral authority responsible for certifying the election, although an overwhelming consensus of credible reporting may also be used [1]. If a recount starts before the total becomes official, the market stays open until the recount finishes and the vote is made official [1]. If results are not known definitively by June 30, 2027 at 11:59 PM ET, the market resolves to "Other" [1]. The listed end time of 2026-11-04T04:59:00.000Z is a contract timestamp, and the rules describe the election as "currently expected to be held on November 3, 2026" [1]. The end time is not itself a resolution, and the timing of certification determines when the official count is available. For election background, a Wikipedia article on the 2026 Texas House elections describes the contest as one in which the state's thirty-eight U.S. representatives, one from each congressional district, will be elected on November 3, 2026. It also reports that primaries took place on March 3, 2026, with runoffs on May 26 in races where no candidate passed 50 percent in the primary [2]. That article is an encyclopedia description of a scheduled election, and the retrieved text does not report any results for the TX-12 race.

Historical Context

The most recent completed Texas House cycle in the supplied sources is the 2024 election. Those elections were held on November 5, 2024, to elect the state's thirty-eight U.S. representatives, one from each congressional district. They coincided with the 2024 U.S. presidential election and with other House, Senate, state and local races. The primary elections took place on March 5, 2024 [3]. The supplied 2024 source does not discuss the 12th district specifically, so it provides only general cycle background for the 2026 contract.

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