According to CoinMeta, Kalshi reports that the trading volume in the U.S. midterms market in 2026 exceeded $2.5 billion, nearly twice the $1.3 billion in 2024. Based on a review by Kalshi on November 4th, traders anticipated that the Democratic Party would control both houses of Congress before election day, although they underestimated the number of seats the party would win. The reported trading volume increased by over 92% compared to the previous electoral cycle. In preliminary statistics, Kalshi indicated that market favorites won 479 out of 487 races before 6 a.m. on November 4th. This statistic covers races for the House of Representatives, the Senate, and governorships, as well as for attorney general, lieutenant governor, and secretary of state. The company listed 356 winning favorites in 360 House of Representatives races, 32 in 33 Senate races, and 33 in 34 governorship races. The overall success rate was about 98.4%, which was rounded to 98% in the announcement.