Democrats Lead US Midterm Polls and Odds

US midterm elections take place halfway through a president’s four-year term. Voters choose members of Congress, rather than electing a president. These contests matter because control of Congress shapes which legislation can advance and how the administration is checked.

On Tuesday, 3 November 2026, all 435 seats in the House of Representatives are up for election. So are 35 of the Senate’s 100 seats. The House contests cover every congressional district, while Senate contests occur in selected states.

Democrats enter the final weekend with a national polling lead. Their advantage is 51.4% to 43.2% in RealClearPolling’s congressional average. Prediction markets also favor Democrats, giving them a 94.5% chance of winning the House and 72.5% chance of winning the Senate, as of 1 November. Results will arrive after polls close across the states.

The national polling lead measures the share of respondents supporting Democratic or Republican congressional candidates. RealClearPolling’s average stood at 51.4% for Democrats and 43.2% for Republicans on 31 October. That is an 8.2-point Democratic advantage. It signals a favorable national environment, but it is not a count of seats.

Prediction markets express traders’ current expectations as percentages. Polymarket put Democrats at 94.5% for the House and 72.5% for the Senate on 1 November at 8:22 a.m. ET. Its balance-of-power market gave Democrats a 71.5% chance of winning both chambers.

These numbers show a strong Democratic position entering the final weekend. Still, they are not guaranteed outcomes. Market prices can move within minutes, and polls or markets can differ from the final result. Early voting was also running ahead of 2022, with more than 43 million ballots cast five days before Election Day.

A prediction market lets participants buy and sell contracts tied to a future outcome. The trading price is shown as a probability. It reflects what participants collectively believe at that moment, rather than answers from a voter survey. The figure can change when news, polls, or campaign developments change expectations.

For example, Polymarket gave Democrats a 94.5% chance of winning the House on 1 November at 8:22 a.m. ET. In plain language, traders were pricing a very high likelihood of Democratic House control. The market had traded US$35.3 million on the House outcome and US$13.7 million on the Senate outcome.

The percentage is not a guarantee and is not a poll result. The article explicitly describes market prices as bets that can move within minutes. Polymarket also gave Democrats a 72.5% Senate chance and a 71.5% chance of sweeping both chambers. Official results remain the final test.

A national congressional poll combines voters from across the country. It answers who is more popular overall. Congressional control, however, depends on many separate contests. House seats are won district by district, while Senate seats are decided in individual states. Votes in one state or district do not directly transfer to another.

For example, Democrats can lead the national poll average while Republicans remain competitive in particular Senate races. The article highlights Kansas, where Republican Senator Roger Marshall faced Democratic challenger Adam Hamilton. A September Emerson College poll put Marshall ahead 45% to 43%, within the margin of error. Texas also featured a contest between Ken Paxton and James Talarico.

That is why national numbers provide context rather than a seat-by-seat result. The 2026 election includes all 435 House seats and 35 Senate seats. Prediction markets favored Democrats nationally, but the final balance still depends on individual contests, turnout, counting, and official results from each state.

Early voting totals measure ballots cast before Election Day, either in person or by mail. They matter because they show that many voters have already participated and that election activity is running ahead of the comparable point in 2022. They also indicate that campaigns and election offices are handling substantial voting before polls close.

Five days before Election Day, more than 43 million Americans had voted. That was nearly 10 million more than at the same point before the 2022 midterms. Early voting rose by more than 30% in Maine, Michigan, North Carolina, and Kansas.

The totals do not identify candidate choices. A ballot count can show how many people voted, but not whether those voters supported Democrats, Republicans, or another choice. The article also cautions that these figures are independent tallies, not official final turnout counts. Their effect on the result will become clearer only as ballots are counted and official results are reported.

A congressional party gains control by winning enough seats in the relevant chamber. In the 435-seat House, that means holding more than half the seats. In the Senate, the winning threshold depends on whether the vice president can break a tie. The result is a seat count, not a direct national vote total.

The article states that Democrats need 51 Senate seats for a majority. Republicans need only 50 because the vice president breaks ties. Thus, a 50-50 Senate can be controlled by the Republican Party when its vice president casts the deciding vote. The 2026 contest includes 35 Senate seats, not all 100.

This rule makes individual Senate races especially important. A party can lead national congressional polls without winning enough key seats. Polymarket gave Democrats a 72.5% Senate chance and identified a Republican Senate with a Democratic House as the next most likely outcome at 22.5%. The final result depends on each contest’s official count.

Election results are not released nationally at one moment. Polls close at different local times, and states use different procedures for counting in-person, mail, and early ballots. Officials may report some votes quickly while other ballots require more processing. These differences create a staggered flow of results.

The first scheduled closings are at 6 p.m. ET Tuesday in parts of Indiana and Kentucky. The last are at 1 a.m. ET Wednesday, 4 November, in Alaska’s Aleutian Islands. Between those times, states and local offices report counted ballots in waves. Early and mail ballots may be included at different stages.

The timing can affect when a race appears competitive or settled, but early returns are not necessarily final. The article advises readers to check their state election office for official figures and to use their local polling-place deadline instead of converting from Eastern Time. It also notes that the full state-by-state closing schedule was not confirmed with every state office.