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535

Alaska Senate

  • Mary Peltola (Dem)
  • Dan Sullivan (Rep · incumbent)

Favors Rep

Republicans74%

Republicans are favored, winning 74,460 of 100,000 simulated elections.

Favors Rep

Republicans74%

Republicans are favored, winning 74,460 of 100,000 simulated elections.

Forecast detail

as of Oct 4, 2026, 2:30 AM EDT

Estimated margin

R+6.4

5th–95th interval

R+22.5 to D+9.6

Estimated margin

R+6.4

5th–95th interval

R+22.5 to D+9.6

Win probability over time

Dem win probability Rep win probability Tossup band

Polls

The recent polling here measures 2 different matchups, so there is no single contest to average — the forecast rests on fundamentals (the state's partisan lean and the national environment) until the nominees are settled. Every poll is below, grouped by the matchup it tested.

Dem-leaning poll Rep-leaning poll

Polls from partisan-aligned sponsors are shown but not in this view's average — flip “Partisan internals” in the header to include them.Partisan-sponsored polls are in this view's average, shifted 0.7 points toward the non-sponsor party and given half weight — methodology.

Pollster Dates Sample Results Margin House adj. Source
Dan Sullivan (R) vs Mary Peltola (D) · 18 polls
The New York Times/Siena University Sep 24–Oct 1, 2026 504 lv Mary Peltola 50.1% Dan Sullivan 43.1% D+7.0 D+7.0 Even lean removed Source
Quantus Insights Sep 28–Sep 30, 2026 758 lv Dan Sullivan 46.5% Mary Peltola 46.2% R+0.3 D+0.8 R+1.1 lean removed Source
co/efficient Sep 14–Sep 17, 2026 799 lv Dan Sullivan 49.0% Mary Peltola 46.0% R+3.0 R+0.7 R+2.3 lean removed Source
Alaska Survey Research Sep 10–Sep 12, 2026 1,352 lv Mary Peltola 48.4% Dan Sullivan 3.7% D+44.7 — Source
Alaska Survey Research Sep 10–Sep 12, 2026 1,352 lv Mary Peltola 51.9% Dan Sullivan 48.1% D+3.8 — Source
Fabrizio Ward/ Impact Research Sep 8–Sep 11, 2026 800 lv Mary Peltola 53.0% Dan Sullivan 47.0% D+6.0 D+5.1 D+0.9 lean removed Source
Alaska Survey Research Aug 20–Aug 23, 2026 1,495 lv Mary Peltola 50.6% Dan Sullivan 49.4% D+1.2 — Source
Alaska Survey Research Aug 2–Aug 5, 2026 1,371 lv Mary Peltola 50.8% Dan Sullivan 49.2% D+1.6 — Source
Data for Progress Jul 28–Aug 4, 2026 567 lv Mary Peltola 53.0% Dan Sullivan 47.0% D+6.0 — Source
The New York Times/Siena University Jun 15–Jun 29, 2026 593 lv Dan Sullivan 47.5% Mary Peltola 45.1% R+2.4 R+2.4 Even lean removed Source
Alaska Survey Research Mar 19–Mar 22, 2026 1,340 rv Mary Peltola 52.4% Dan Sullivan 47.6% D+4.8 — Source
Public Policy Polling dem sponsor Jan 16–Jan 17, 2026 611 rv Mary Peltola 49.0% Dan Sullivan 47.0% D+2.0 D+3.5 R+1.5 lean removed Source
Alaska Survey Research Jan 8–Jan 11, 2026 1,681 lv Mary Peltola 48.0% Dan Sullivan 46.4% D+1.6 — Source
Data for Progress Oct 17–Oct 23, 2025 823 rv Mary Peltola 46.0% Dan Sullivan 45.0% D+1.0 — Source
Alaska Survey Research Oct 10–Oct 15, 2025 1,708 lv Mary Peltola 47.7% Dan Sullivan 45.9% D+1.8 — Source
Alaska Survey Research Jul 29–Aug 1, 2025 1,613 lv Dan Sullivan 46.7% Mary Peltola 42.5% R+4.2 — Source
Data for Progress Jul 21–Jul 27, 2025 678 lv Dan Sullivan 46.0% Mary Peltola 45.0% R+1.0 — Source
Alaska Survey Research Apr 21–Apr 25, 2023 1,261 lv Mary Peltola 44.0% Dan Sullivan 41.0% D+3.0 — Source
Gerald Heikes (R) vs Mary Peltola (D) · 8 polls Polled before the field was set
Quantus Insights Sep 28–Sep 30, 2026 758 lv Mary Peltola 46.5% Rep 1.5% D+45.0 D+46.1 R+1.1 lean removed Source
Trafalgar Group rep sponsor Sep 22–Sep 24, 2026 1,079 lv Mary Peltola 45.5% Rep 0.7% D+44.8 — Source
co/efficient Sep 14–Sep 17, 2026 799 lv Mary Peltola 46.0% Rep 1.0% D+45.0 D+47.3 R+2.3 lean removed Source
Fabrizio Ward/ Impact Research Sep 8–Sep 11, 2026 800 lv Mary Peltola 46.0% Rep 3.0% D+43.0 D+42.1 D+0.9 lean removed Source
Fabrizio Ward/ Impact Research Sep 8–Sep 11, 2026 800 lv Mary Peltola 50.0% Rep 3.0% D+47.0 D+46.1 D+0.9 lean removed Source
Data for Progress Jul 28–Aug 4, 2026 605 lv Mary Peltola 47.0% Rep 3.0% D+44.0 — Source
Data for Progress Jul 28–Aug 4, 2026 578 lv Mary Peltola 49.0% Rep 3.0% D+46.0 — Source
Alaska Survey Research May 14–May 17, 2026 1,401 lv Mary Peltola 48.4% Rep 2.7% D+45.7 — Source
Dustin Darden (R) vs Mary S. Peltola (D) · 1 poll Polled before the field was set
Alaska Survey Research Jun 4–Jun 7, 2026 1,393 lv Mary Peltola 49.4% Rep 2.7% D+46.7 — Source
James Ryan (R) vs Mary S. Peltola (D) vs Sidney Hill (I) · 1 poll Polled before the field was set
Alaska Survey Research Apr 16–Apr 19, 2026 1,946 lv Mary Peltola 49.1% Rep 5.2% Ind 3.2% D+43.9 — Source
James Ryan (R) vs Mary S. Peltola (D) · 1 poll Polled before the field was set
Alaska Survey Research Apr 16–Apr 19, 2026 1,946 lv Mary Peltola 50.2% Rep 6.2% D+44.0 — Source
Ann Diener (D) vs Christopher Miklos (R) · 1 poll Polled before the field was set
Alaska Survey Research Mar 19–Mar 22, 2026 1,340 rv Rep 5.2% Dem 2.4% R+2.8 — Source

Dispatches about this race

Poll reaction Alaska Senate Oct 3, 2026

Times/Siena puts Peltola at 50.07 percent in Alaska; our forecast ticks up a point

The new survey has the Democrat above Sullivan, but our model still has the Republican incumbent as the favorite, with an unchanged average margin of R+6.5.

A New York Times/Siena University survey of 504 likely voters, fielded September 24 to October 1, has Democrat Mary Peltola at 50.07 percent and Republican Sen. Dan Sullivan at 43.07 percent in the Alaska Senate race.

The poll moved our forecast by one point. Our model now gives Peltola a 26 in...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5.5

Poll reaction Alaska Senate Oct 2, 2026

Quantus Insights has Sullivan and Peltola nearly even; our Alaska forecast stays put

The near-tie in the new survey sits well inside our model's range of outcomes, which still centers on a Sullivan win by about six and a half points.

A Quantus Insights survey of 758 likely voters in Alaska, fielded September 28-30, found Republican Sen. Dan Sullivan at 46.5% and Democrat Mary Peltola at 46.2%. A gap of three-tenths of a point is no lead for either candidate. The poll shows a close race.

Our forecast did not move on the new...

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Written autonomously by anthropic/claude-opus-5.5

Poll reaction Alaska Senate Sep 26, 2026

Trafalgar poll puts Peltola at 45.5 in Alaska; our forecast edges down a point

The Republican figure in the Trafalgar data we received is not usable, so there is no margin to report, and our model still has Sullivan favored.

A Trafalgar Group survey of 1,079 likely voters, fielded September 22-24, puts Democrat Mary Peltola at 45.5 percent in the Alaska Senate race. The Republican share in the results we received for this poll is incomplete and not a plausible figure. We are not reporting a head-to-head margin from...

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Written autonomously by anthropic/claude-opus-5.5

Poll reaction Alaska Senate Sep 22, 2026

Alaska Survey Research shows Peltola ahead; our forecast holds at 26 in 100

Two sets of numbers from the same 1,352-voter sample moved our Alaska Senate margin by a tenth of a point.

Alaska Survey Research polled 1,352 likely voters from September 10 to 12 and released two sets of numbers. In the first, Mary Peltola takes 51.9 percent to Dan Sullivan's 48.1. In the second, drawn from the same sample, Peltola has 48.4 percent and Sullivan 3.7. The payload does not say what...

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Written autonomously by anthropic/claude-opus-5

Poll reaction Alaska Senate Sep 17, 2026

Sullivan 49, Peltola 46 in new Alaska poll; our forecast moves a point

The co/efficient survey is the first recent Alaska number with the Republican incumbent in front, and our model still puts the mean margin near R+7.

A co/efficient survey of 799 likely voters in Alaska, fielded September 14-17, puts Republican Dan Sullivan at 49 percent and Democrat Mary Peltola at 46 percent. The three-point gap is small enough, on that sample, to be consistent with either candidate ahead. The race is close in this...

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Written autonomously by anthropic/claude-opus-5

Poll reaction Alaska Senate Sep 17, 2026

Peltola leads by six in new AARP-sponsored Alaska poll; our forecast is unchanged

A Fabrizio Ward/Impact Research survey puts her at 53-47, but our model still gives Dan Sullivan roughly a three-in-four chance.

A Fabrizio Ward/Impact Research poll sponsored by AARP, of 800 likely voters fielded September 8-11, puts Democrat Mary Peltola at 53 percent and Republican incumbent Dan Sullivan at 47 percent in the Alaska Senate race. That is a wider Peltola margin than the polls we have written about here in...

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Written autonomously by anthropic/claude-opus-5

Poll reaction Alaska Senate Sep 2, 2026

New Alaska survey splits within a point; our forecast does not move

Alaska Survey Research has the Senate race essentially tied, while our model still gives Mary Peltola a 24 in 100 chance against Dan Sullivan.

An Alaska Survey Research poll of 1,495 likely voters, fielded August 20-23, put Mary Peltola at 50.6 percent and Dan Sullivan at 49.4 percent. That 1.2-point gap is small enough to describe the race only as close.

Our forecast did not respond. It gives Peltola a 24 in 100 chance and Sullivan 76...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5

Poll reaction Alaska Senate Aug 31, 2026

Alaska Senate forecast gives Sullivan a wider margin and Peltola better odds

The latest run raises the mean margin to R+8.3 from R+5.6, but a much wider band of outcomes lifts Mary Peltola's estimated chance of winning to 24%.

The most recent survey in our Alaska file is from Alaska Survey Research, fielded August 2-5 among 1,371 likely voters. It put Mary Peltola at 50.8% and Dan Sullivan at 49.2% — a gap well inside sampling error, and so a close race rather than a lead for either candidate. A New York Times/Siena...

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Written autonomously by anthropic/claude-opus-5

Movement note Alaska Senate Aug 24, 2026

Model moves Alaska Senate back toward Sullivan, without a new poll to point to

Mary Peltola's chance in our forecast fell from 35% to 25% over seven days, and the payload for this run contains no survey fielded since early August.

Our model now gives Mary Peltola a 25 in 100 chance of winning the Alaska Senate race, down from 35% in our run of August 17. That is a drop of 10.1 points of Democratic win probability over seven days, all of it toward Republican incumbent Dan Sullivan.

The estimated margin moved with it. Our...

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Written autonomously by anthropic/claude-opus-5

Poll reaction Alaska Senate Aug 20, 2026

Another Alaska poll puts Peltola up five; our model barely moves

Data for Progress has Peltola at 50 and Sullivan at 45, but our forecast still gives the Republican incumbent about a 71 percent chance.

A Data for Progress survey of 575 likely voters in Alaska, fielded July 28 to August 4, has Democrat Mary Peltola at 50 percent and Republican Sen. Dan Sullivan at 45 percent.

Our forecast did not follow the poll. The model now gives Peltola a 29 in 100 chance of winning the seat, with Sullivan...

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Written autonomously by anthropic/claude-opus-5

Poll reaction Alaska Senate Aug 17, 2026

Peltola ahead in two Alaska polls; our model still leans to Sullivan

Two Data for Progress ballot tests put the Democrat up six, and our estimate of her chance of winning rose from 23 percent to 34 percent.

Two new surveys of the Alaska Senate race both show Mary Peltola ahead of Dan Sullivan. A Data for Progress poll of 605 likely voters, fielded July 28 to August 4, has Peltola at 47 percent and Sullivan at 41 percent. A second ballot test from the same Data for Progress survey of 605 likely...

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Written autonomously by anthropic/claude-opus-5

Movement note Alaska Senate Aug 17, 2026

Model moves Alaska Senate toward Peltola in a single overnight run

Our estimate of Mary Peltola's chance against Republican Dan Sullivan rose from 23 percent to 34 percent between Sunday night and Monday evening, with no new survey in the payload to explain it.

Our model now gives Democrat Mary Peltola a 34 in 100 chance of winning the Alaska Senate race against Republican incumbent Dan Sullivan. That is up 10.8 points from the 23 percent estimate in our previous run, dated August 16 at 10:15 PM ET. The two runs are one day apart.

The expected margin...

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Written autonomously by anthropic/claude-opus-5