Midterms 2026 Turn Real: Early Ballots Flow as Forecasters Give Dems 83% House Odds

Physical ballots are arriving at election offices across two states today, transforming the 2026 midterms from a political forecast into a live, unfolding contest — one that will determine whether Democrats can seize control of both chambers of Congress for the first time since 2009.

The Starting Gun: Ballots Being Cast Right Now

Iowa opened in-person absentee voting Wednesday, Oct. 14, at county auditor offices statewide, with the window running through Nov. 2. Voters are deciding governor, a U.S. Senate seat, and the state's congressional delegation. Georgia began a day earlier, on Oct. 13, with advance polling running through Oct. 30 in a midterm featuring an open Senate seat, a governor's race, and all 14 of the state's congressional districts.

South Carolina and Texas both launch Monday, Oct. 19. Texas early voting runs through Oct. 30, while South Carolina's window closes Oct. 31. Michigan's statewide early voting period — enshrined by a 2022 ballot measure — is set to begin Oct. 24, the second Saturday before Election Day, and runs through Nov. 1. The broader national picture: states like Minnesota and South Dakota began accepting early ballots in mid-September, meaning millions of votes across the country are already in before most of the country has even opened its windows.

Two Very Thin Margins: What Congress Is Defending

Republicans enter Election Day holding a 53–47 Senate majority and a bare-minimum 218–214 House edge, according to Ballotpedia. Democrats need a net gain of four Senate seats to reach 51 and claim the upper chamber. In the House, they also need a net four-seat swing — a figure that has the Republican majority sitting precisely at the 218-seat majority threshold, leaving virtually no margin for error. Fox News Power Rankings are tracking six Senate races rated as pure toss-ups and 18 competitive House districts where neither party holds a clear edge.

Forecast Models Lean Decisively Blue

As of Wednesday morning, the Poliwave election model — which runs 100,000 daily simulations — projects Democrats at an 83% probability of winning the House and a 61% chance of flipping the Senate, with median seat totals of 229 House seats and 51 Senate seats. Prediction markets tell a similar story: traders on Polymarket price a full Democratic sweep of Congress at 62%, while the probability of a Republican sweep has fallen to just 29%.

Analysts at Northeastern University note that the president's party has lost House seats in 37 of the last 41 midterm cycles, and that the current combination of a deeply unpopular president and a wide generic ballot lead resembles — or exceeds — the environment that delivered Democrats their 41-seat House gain in 2018.

The Trump Factor: Approval, Enthusiasm, and the Ballot

A September NPR/PBS News/Marist poll found Trump's favorability at 37% among registered voters — a 7-point decline from the 44% he carried at the start of his second term in January 2025. His job approval in the same survey stands at 39%, with strong disapproval hitting its highest mark since the question was first polled in 2017. Nearly half of registered voters (45%) now describe their congressional ballot choice as primarily a vote against the president.

On the generic congressional ballot, the RealClearPolitics average places Democrats ahead by 8.3 points — a margin comparable to the environment heading into 2018, when the party ultimately gained 41 House seats.

Voter motivation data sharpens the picture further. A September 2026 Emerson College poll found 78% of Democrats describe themselves as very excited to vote in the midterms, against 66% of Republicans — a 12-point enthusiasm gap that mirrors conditions from past Democratic wave elections.

Reports suggest several Republican candidates in competitive districts have asked Trump to keep his distance from their campaigns, wary that his persistent approval-rating deficits could cost them crucial swing-district votes, according to the Washington Examiner.

Six Senate Battlegrounds No One Can Call

The Cook Political Report shifted Senate races in Texas and Iowa from "Lean Republican" to toss-up in August — a reclassification that Senate Minority Leader Chuck Schumer used as a public rallying point, saying Democrats had "blown the map wide open." The Fox News Power Rankings now list six states where neither party has a clear edge: Michigan, Iowa, Texas, Ohio, Maine, and Alaska.

In Texas, Democratic state Rep. James Talarico faces Republican Attorney General Ken Paxton for the open Senate seat being vacated by Sen. John Cornyn — a race that would have been considered a foregone Republican conclusion just two cycles ago, given that Texas has not elected a Democratic senator since 1993. In Ohio, former Sen. Sherrod Brown is making a Senate comeback bid, challenging Republican Jon Husted — who was appointed to fill the seat vacated by Vice President JD Vance — in a state that has trended increasingly red but where Brown has a long track record of outrunning national Democrats.

What Comes Next

Early voting windows close across most states between Oct. 30 and Nov. 1. Iowa, Georgia, Texas, and South Carolina are currently open or opening within days, part of a national rollout that began in mid-September in states like Minnesota and South Dakota. With the Senate gap at six seats and the House margin at four, the ballots now being cast in Georgia and Iowa — and arriving in the coming days in Texas, South Carolina, and Michigan — are not a prelude to Election Day. They are Election Day.

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