2026 US Midterm Elections

Real-time forecasts from the Metaculus community.

DemocratRepublican

Chamber control

HouseForecast:84.7% / 15.3%
Current:D 215 / R 220
SenateForecast:41.8% / 58.2%
Current:D 47 / R 53

Seat Distributions

The community's forecasts for the final seat advantage in each chamber.

Key Drivers

A national emergency declaration could expand federal authority over the election.

Missouri voters decide whether to repeal the abortion-rights protections they enshrined in 2024.

New USPS restrictions could reshape mail-in voting access, but pending lawsuits may block them before November.

Electoral Consequences

How forecasted outcomes shift depending on which party holds Congress.

Will Trump be impeached again?

if Dem Congress
80%
if Split Congress
55%
if Rep Congress
4%

US Congress limits presidential war powers before Jan 3, 2029?

if Dem Congress
55%
if Split Congress
23%
if Rep Congress
10%

Will there be an unfilled Supreme Court vacancy on Jan 20, 2029?

if Dem Congress
20%
if Split Congress
15%
if Rep Congress
7%

Bill limiting tariff authority pass both chambers during the 120th Congress?

if Dem Congress
60%
if Split Congress
24%
if Rep Congress
14%

Bill limiting abortion funding/access during the 120th Congress?

if Dem Congress
2%
if Split Congress
5%
if Rep Congress
50%

Community Insights

Dumbledores_Army
Metaculus User

Consensus looks too low for 'other'. Note that you can get to an 'other' resolution by an exact tie, and IMO probability of a tie isn't as low as 0.1%. I went for 0.5% but mostly intuition based. There is at least one historical precedent for an exact tie during the 72nd Congress starting 1931.

Zaldath
Metaculus User

It's looking roughly 50/50 at the moment. Election Betting Odds has it now at 55-45 (in favor of Democrats). https://electionbettingodds.com/House-Control-2026.html The main reason for the huge shift in favor of Republicans recently is probably that they're clearly winning the gerrymandering fight... 1\) There are c

MaxR
Metaculus User

Updates since Zaldath's comment last month: California's Proposotion 50 actually passed, estimates seem to be 3-5 additional House seats for Democrats Election Betting Odds is back up at 71-29, favoring the Democrats

laterre
Metaculus User

I have this script that will take the odds for each race from Polymarket, normalize them (accounting for competitive independents in Montana and Nebraska) and then calculate the cumulative distribution for getting >=X (while treating each race as independent). It gets around 53.5% for Dems getting at least 51 seats. Th

Heramb_42
Metaculus User

Looking at the 2026 map, it seems like possible pickups for Democrats are in Ohio (?), Maine and North Carolina while they are vulnerable in Michigan, Colorado and Georgia. I don't think realistically Texas or Louisiana or any other state seems up for grabs. Even if all of these swing Democrats way, the Republicans st

ÅXXXL
Metaculus User

The Senate and House respond to different structural forces. Senate control is primarily driven by seat exposure and state-level fundamentals, while the House is more sensitive to national mood and turnout dynamics. In polarized environments, this asymmetry increases the base rate of divided government relative to unif

ÅXXXL
Metaculus User

Rationale My forecast prioritizes structural asymmetry and base-rate outcomes over short-term polling noise. Rather than treating the four outcomes symmetrically, I decompose the question into separate Senate and House dynamics and recombine them into a joint distribution. Why divided government is the modal outcome

tejvn
Metaculus User

The questions about the overall balance of power in the Senate and House have been open for many months. For tournament ranking, does only the coverage from May 27 onwards count?

Hippopotamus_bartholomeus
Metaculus User

Does this tournament run until January 2029, since the Democracy Threat Index question can only be resolved after Dec 31 2028?

sanjaymesja
Metaculus User

Up until now I was using polling numbers but not working through the different possible general matchups and what would matter in each case. And after applying the probabilities to each potential path to victory for each candidate I've surprisingly (to me at least) arrived pretty much at the consensus conclusion, so I

nextbigfuture
Metaculus User

Why was there no adjustment to the expectation on this question when redistricting has or will gerrymander a net 24 seats for the republicans in the house? Louisiana and South Carolina are each drawing in another seat. TX: +3-5R🔴FL: +3-5R🔴OH: +1-3R🔴NC: +1R🔴TN: +1R🔴MO: +1 —R🔵CA: +3-5D🔵UT: +1 D Total Passed:🔴Re

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