Skip to content
535

Iowa Senate

  • Josh Turek (Dem)
  • Ashley Hinson (Rep)

Tossup

Democrats58%

This race is a Tossup — the leading side wins 57,923 of 100,000 simulated elections.

Tossup

Democrats57%

This race is a Tossup — the leading side wins 57,357 of 100,000 simulated elections.

Forecast detail

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

Estimated margin

D+1.1

5th–95th interval

R+7.9 to D+10.2

Estimated margin

D+1.0

5th–95th interval

R+8.0 to D+10.1

Win probability over time

Dem win probability Rep win probability Tossup band

Polls

Dem-leaning poll Rep-leaning poll current average: D+1.1 current average: D+1.0

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
Ashley Hinson (R) vs Josh Turek (D) · 20 polls
The New York Times/Siena University Sep 22–Oct 1, 2026 606 lv Ashley Hinson 47.8% Josh Turek 47.0% R+0.9 R+0.8 Even lean removed Source
Quantus Insights Sep 28–Sep 29, 2026 738 lv Ashley Hinson 51.2% Josh Turek 48.8% R+2.4 R+1.3 R+1.1 lean removed Source
Beacon Research/Shaw & Company Research Sep 24–Sep 28, 2026 1,204 rv Josh Turek 50.0% Ashley Hinson 46.0% D+4.0 D+3.2 D+0.8 lean removed Source
Beacon Research/Shaw & Company Research Sep 24–Sep 28, 2026 1,008 lv Josh Turek 49.0% Ashley Hinson 47.0% D+2.0 D+1.2 D+0.8 lean removed Source
Marist University Sep 17–Sep 20, 2026 1,050 rv Josh Turek 50.0% Ashley Hinson 42.0% D+8.0 D+5.8 D+2.2 lean removed Source
YouGov Sep 3–Sep 8, 2026 2,127 lv Josh Turek 45.0% Ashley Hinson 43.0% D+2.0 D+1.8 D+0.2 lean removed Source
YouGov Sep 3–Sep 8, 2026 2,041 lv Josh Turek 47.0% Ashley Hinson 43.0% D+4.0 D+3.8 D+0.2 lean removed Source
YouGov Sep 3–Sep 8, 2026 2,166 rv Josh Turek 44.0% Ashley Hinson 43.0% D+1.0 D+0.8 D+0.2 lean removed Source
Wedgewood Polls Aug 27–Aug 29, 2026 600 lv Ashley Hinson 50.0% Josh Turek 48.0% R+2.0 R+2.1 D+0.1 lean removed Source
Abacus Data Aug 26–Aug 28, 2026 500 rv Josh Turek 41.0% Ashley Hinson 36.0% D+5.0 D+4.2 D+0.8 lean removed Source
Abacus Data Aug 26–Aug 28, 2026 323 lv Josh Turek 48.0% Ashley Hinson 41.0% D+7.0 D+6.2 D+0.8 lean removed Source
Emerson College Aug 2–Aug 4, 2026 712 lv Ashley Hinson 47.5% Josh Turek 45.0% R+2.5 R+3.3 D+0.7 lean removed Source
The New York Times/Siena University Jun 15–Jun 27, 2026 600 lv Ashley Hinson 48.5% Josh Turek 46.0% R+2.5 R+2.4 Even lean removed Source
Beacon Research/Shaw & Company Research Jun 23–Jun 27, 2026 1,003 rv Josh Turek 50.0% Ashley Hinson 46.0% D+4.0 D+3.2 D+0.8 lean removed Source
Cygnal Political rep sponsor Jun 16–Jun 19, 2026 600 lv Ashley Hinson 46.0% Josh Turek 44.2% R+1.8 R+1.7 R+0.1 lean removed Source
Global Strategy Group dem sponsor Jun 8–Jun 11, 2026 1,000 lv Josh Turek 47.0% Ashley Hinson 45.0% D+2.0 — Source
Public Policy Polling dem sponsor Jun 3–Jun 4, 2026 557 rv Ashley Hinson 46.0% Josh Turek 46.0% Even D+1.5 R+1.5 lean removed Source
Echelon Insights Apr 3–Apr 9, 2026 377 lv Josh Turek 46.0% Ashley Hinson 45.0% D+1.0 D+1.4 R+0.4 lean removed Source
GBAO dem sponsor Mar 10–Mar 16, 2026 1,200 lv Ashley Hinson 47.0% Josh Turek 43.0% R+4.0 R+4.7 D+0.7 lean removed Source
Change Research Jan 8–Jan 11, 2026 1,108 lv Ashley Hinson 44.0% Josh Turek 41.0% R+3.0 R+3.5 D+0.5 lean removed Source
Ashley Hinson (R) vs Josh Turek (D) vs Thomas Laehn (LIB) · 8 polls
Quantus Insights Sep 28–Sep 29, 2026 738 lv Ashley Hinson 48.5% Josh Turek 46.6% Other 1.7% R+1.9 R+0.8 R+1.1 lean removed Source
InsiderAdvantage Sep 22–Sep 23, 2026 1,200 lv Josh Turek 47.4% Ashley Hinson 45.7% Other 1.6% D+1.7 D+2.6 R+0.9 lean removed Source
Trafalgar Group rep sponsor Sep 16–Sep 18, 2026 1,089 lv Ashley Hinson 44.0% Josh Turek 42.1% Other 3.4% R+1.9 — Source
co/efficient Sep 14–Sep 16, 2026 831 lv Ashley Hinson 46.0% Josh Turek 42.0% Other 2.0% R+4.0 R+1.7 R+2.3 lean removed Source
Cygnal Political rep sponsor Sep 9–Sep 11, 2026 500 lv Josh Turek 42.9% Ashley Hinson 42.9% Other 3.6% Even D+0.1 R+0.1 lean removed Source
Emerson College Aug 31–Sep 1, 2026 750 lv Ashley Hinson 49.5% Josh Turek 45.1% Other 0.8% R+4.4 R+5.1 D+0.7 lean removed Source
Global Strategy Group dem sponsor Aug 27–Aug 31, 2026 800 lv Josh Turek 46.0% Ashley Hinson 42.0% Other 6.0% D+4.0 — Source
Suffolk University Aug 20–Aug 23, 2026 500 lv Ashley Hinson 45.4% Josh Turek 40.8% Other 4.0% R+4.6 R+4.3 R+0.3 lean removed Source
Ashley Hinson (R) vs Zach Wahls (D) · 3 polls Polled before the field was set
Echelon Insights Apr 3–Apr 9, 2026 377 lv Dem 46.0% Ashley Hinson 44.0% D+2.0 D+2.4 R+0.4 lean removed Source
GBAO dem sponsor Mar 10–Mar 16, 2026 1,200 lv Ashley Hinson 47.0% Dem 44.0% R+3.0 R+3.7 D+0.7 lean removed Source
Change Research Jan 8–Jan 11, 2026 1,108 lv Ashley Hinson 44.0% Dem 41.0% R+3.0 R+3.5 D+0.5 lean removed Source
Ashley Hinson (R) vs Nathan Sage (D) · 1 poll Polled before the field was set
Change Research Jan 8–Jan 11, 2026 1,108 lv Ashley Hinson 44.0% Dem 41.0% R+3.0 R+3.5 D+0.5 lean removed Source
Joni K. Ernst (R) vs Zach Wahls (D) · 1 poll Polled before the field was set
Public Policy Polling dem sponsor Aug 18–Aug 19, 2025 572 rv Dem 45.0% Rep 43.0% D+2.0 D+3.5 R+1.5 lean removed Source
Joni K. Ernst (R) vs Nathan Sage (D) · 1 poll Polled before the field was set
Public Policy Polling dem sponsor Aug 18–Aug 19, 2025 572 rv Rep 44.0% Dem 42.0% R+2.0 R+0.5 R+1.5 lean removed Source
Jackie Norris (D) vs Joni K. Ernst (R) · 1 poll Polled before the field was set
Public Policy Polling dem sponsor Aug 18–Aug 19, 2025 572 rv Rep 44.0% Dem 43.0% R+1.0 D+0.5 R+1.5 lean removed Source
Joni K. Ernst (R) vs Josh Turek (D) · 1 poll Polled before the field was set
Public Policy Polling dem sponsor Aug 18–Aug 19, 2025 572 rv Rep 44.0% Josh Turek 43.0% R+1.0 D+0.5 R+1.5 lean removed Source

Dispatches about this race

Poll reaction Iowa Senate Oct 3, 2026

Siena poll has Hinson a point ahead in Iowa, and our estimate eases two points

The New York Times/Siena survey trims Josh Turek's edge in our model to a 58% chance, still within a wide range of outcomes for the open seat.

A New York Times/Siena University survey of 606 likely voters in Iowa, fielded September 22 to October 1, puts Republican Ashley Hinson at 47.8% and Democrat Josh Turek at 47.0%. A gap of under one point in a poll of that size is not a lead. The race is close.

Our model now gives Turek a 58 in...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5.5

Poll reaction Iowa Senate Oct 2, 2026

Our Iowa Senate estimate moves three points toward Turek in the latest run

A Fox News survey of 1,204 registered voters, now fully reflected in our average, nudges Turek's chance to 61% in the open-seat race.

Our model now gives Democrat Josh Turek a 61 in 100 chance of winning the open Iowa Senate seat, up from 58% in the run at 8:32 AM ET on October 2. Republican Ashley Hinson's chance moved from 42% to 39%. The incumbent in the seat is Republican Joni Ernst.

The poll in this update is a Beacon...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5.5

Poll reaction Iowa Senate Oct 1, 2026

Fox News poll shows a close Iowa Senate race, and our estimate barely moves

A two-point Turek edge in the Beacon/Shaw survey nudges our model from 57% to 58% for the Democrat in the open-seat contest, confirming where it already stood.

A Fox News survey by Beacon Research and Shaw & Company Research, fielded September 24-28 among 1,008 likely voters, has Democrat Josh Turek at 49% and Republican Ashley Hinson at 47% in Iowa's open Senate race. That two-point gap is small enough that the race is best described as close.

The...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5.5

Poll reaction Iowa Senate Sep 30, 2026

Quantus finds a close Iowa Senate race, and our estimate eases toward Hinson

Our model's mean margin narrows to D+1.0 from D+1.5, a modest move after last week's shift toward Turek.

A new Quantus Insights survey of 738 likely voters, fielded September 28-29, finds the Iowa Senate race close. In a head-to-head question, Republican Ashley Hinson takes 51.2% to 48.8% for Democrat Josh Turek. In a version of the question that included other candidates, the same survey puts...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5.5

Poll reaction Iowa Senate Sep 26, 2026

InsiderAdvantage finds a close Iowa Senate race, and our estimate edges toward Turek

A new survey showing Turek and Hinson under two points apart nudged our model's Democratic chance from 60% to 62% for the open Iowa seat.

An InsiderAdvantage survey of 1,200 likely voters, fielded September 22-23, finds the Iowa Senate race close. It puts Democrat Josh Turek at 47.4% and Republican Ashley Hinson at 45.7%, with 1.6% choosing another option. That 1.7-point gap is small enough that we treat the race as close.

The...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5.5

Movement note Iowa Senate Sep 22, 2026

Our Iowa Senate estimate moves 10 points toward Turek in a week

A Marist University poll of 1,050 registered voters arrived after our last run, and our mean margin in the open Iowa seat flipped from R+0.7 to D+0.8.

Our model now gives Democrat Josh Turek a 56 in 100 chance of winning Iowa's open Senate seat, up from 45% in our run of September 15. That is a move of 10.4 points of Democratic win probability over seven days. Republican Ashley Hinson is at 44%.

The mean margin moved with it, from R+0.7 in the...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5

Poll reaction Iowa Senate Sep 22, 2026

Marist puts Turek up eight in Iowa, and our estimate crosses to 56 in 100

A week of close polls had left our Iowa Senate estimate at 41 in 100 for the Democrat; one survey moved it 15 points.

A Marist University survey of 1,050 registered voters in Iowa, fielded September 17-20, has Democrat Josh Turek at 50 percent and Republican Ashley Hinson at 42 percent. That is the widest margin in the polling our model has seen in this race in recent weeks, and it arrived after a run of surveys...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5

Poll reaction Iowa Senate Sep 19, 2026

Trafalgar finds Iowa Senate race close, and our estimate holds at 42 in 100

A Trafalgar Group survey of 1,089 likely voters has Ashley Hinson at 44 percent and Josh Turek at 42.1 percent, leaving our forecast unchanged.

A Trafalgar Group survey of 1,089 likely voters in Iowa, fielded September 16-18, puts Republican Ashley Hinson at 44.0 percent and Democrat Josh Turek at 42.1 percent, with 3.4 percent for other candidates. The gap is under two points, which is another way of saying the poll found a close race...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5

Poll reaction Iowa Senate Sep 16, 2026

co/efficient puts Hinson up four in Iowa, and our estimate ticks back

Our model now gives Josh Turek a 42 in 100 chance in Iowa, down from 44 percent in the previous run earlier today.

A co/efficient survey of 831 likely voters in Iowa, fielded September 14-16, has Republican Ashley Hinson at 46 percent and Democrat Josh Turek at 42 percent, with 2 percent for another candidate. The payload gives no margin of error for the poll, and a four-point gap in a sample that size is the...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5

Poll reaction Iowa Senate Sep 15, 2026

Cygnal poll has Iowa Senate tied, and our estimate does not move

A tie at 42.9 percent leaves Josh Turek with a 45 in 100 chance against Ashley Hinson in our forecast, unchanged from the prior run.

A Cygnal Political survey of 500 likely voters in Iowa, sponsored by the Iowans for Tax Relief Foundation and fielded September 9-11, put Democrat Josh Turek and Republican Ashley Hinson level at 42.9 percent each, with 3.6 percent for other candidates. That is a tie, and it is the only new...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5

Movement note Iowa Senate Sep 14, 2026

Our Iowa Senate estimate moves 13 points toward Turek in a week

Josh Turek's chance in our forecast has gone from 33% on September 7 to 46% now, after four surveys showing a close race.

Our forecast of the Iowa Senate race has moved toward the Democrat, Josh Turek. On September 7 our model gave him a 33% chance against Republican Ashley Hinson. As of the run dated September 14 at 12:32 AM ET, it gives him a 46 in 100 chance. That is a shift of 12.7 points of win probability over...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5

Poll reaction Iowa Senate Sep 11, 2026

Two YouGov samples put Turek narrowly ahead in Iowa, and our estimate edges up

Our model now gives Josh Turek a 47 in 100 chance in the open Iowa Senate race, up from 45 earlier Friday, with a mean margin of R+0.4.

Two YouGov surveys of Iowa likely voters, both fielded September 3-8, have Democrat Josh Turek a few points ahead of Republican Ashley Hinson. One, of 2,041 likely voters, put Turek at 47 percent and Hinson at 43. The other, of 2,127 likely voters, had Turek at 45 and Hinson at 43 — a gap small...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5

Poll reaction Iowa Senate Sep 11, 2026

YouGov poll has Iowa Senate race tied, and our estimate moves toward Turek

Our model now gives Democrat Josh Turek a 45 in 100 chance against Republican Ashley Hinson, up from 31 in 100 earlier today.

A YouGov survey of 2,166 registered voters in Iowa, fielded September 3-8, put Democrat Josh Turek at 44 percent and Republican Ashley Hinson at 43 percent. That one-point gap is not a lead in any meaningful sense; the poll describes a close race for the open seat held by Republican Joni...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5

Poll reaction Iowa Senate Sep 9, 2026

Global Strategy Group poll finds a close Iowa Senate race, and our estimate holds

Josh Turek takes 46 percent to Ashley Hinson's 42 in the new survey; our model still gives Turek a 31 percent chance.

A Global Strategy Group survey of 800 likely voters in Iowa, fielded August 27-31, puts Democrat Josh Turek at 46 percent and Republican Ashley Hinson at 42 percent, with 6 percent for other candidates. No margin of error is reported in what we have, so we treat the four-point gap as a close race...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5

Movement note Iowa Senate Sep 6, 2026

Our Iowa Senate estimate moves 31 points back toward Hinson

The Democrat's chance of winning the open seat fell from 66% on August 30 to 35% now, with an Emerson College poll the only survey to arrive in between.

Our model now gives Josh Turek, the Democrat, a 35 in 100 chance of winning Iowa's open Senate seat, down from 66% in our August 30 run. That is a shift of 31 points toward the Republican, Ashley Hinson, over seven days.

The mean margin moved with it. Our August 30 run had the race at D+2.6 on...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5

Poll reaction Iowa Senate Sep 3, 2026

Emerson poll shows Hinson ahead of Turek by four in Iowa

Our forecast barely moved on the new number, and still gives Josh Turek a 38 in 100 chance in the open Iowa Senate race.

An Emerson College survey for Nexstar, of 750 likely voters fielded August 31 to September 1, puts Republican Ashley Hinson at 49.5 percent and Democrat Josh Turek at 45.1 percent in Iowa's open Senate race. Less than a point went to other candidates.

Our forecast now gives Turek a 38 in 100...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5

Poll reaction Iowa Senate Aug 31, 2026

Our Iowa Senate estimate swings back toward Hinson, 59 to 41

The polling is unchanged and close; what moved was our model, which had Josh Turek ahead by 2.5 points in a run earlier today.

The most recent survey of the Iowa Senate race, from Wedgewood Polls, put Republican Ashley Hinson at 50 percent and Democrat Josh Turek at 48 percent among 600 likely voters fielded August 27-29. That is a close race.

Our forecast now gives Hinson a 59 percent chance of winning the open seat...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5

Poll reaction Iowa Senate Aug 30, 2026

Abacus poll puts Turek up nine in Iowa, and our forecast flips to lean Democratic

The 54-45 result moved our estimate for Josh Turek from a 27 percent chance to 65 percent in the space of a single model run.

An Abacus Data survey of 2,500 likely voters, fielded August 29, has Democrat Josh Turek at 54 percent and Republican Ashley Hinson at 45 percent in Iowa's open Senate race.

That is the largest lead either candidate has held in the polling our model has taken in for this race, and it moved the...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5

Movement note Iowa Senate Aug 30, 2026

Our Iowa Senate estimate moves 41 points toward Turek in a week

A 2,500-voter Abacus Data survey landed after the Wedgewood poll we wrote about Sunday, and our model now gives Josh Turek a 65 percent chance.

Our model gave Democrat Josh Turek a 23 percent chance in Iowa's open Senate race in its August 23 run. As of Sunday night it gives him a 65 in 100 chance against Republican Ashley Hinson, a shift of 41.5 points toward the Democrat over seven days. The projected margin moved with it, from R+4.8...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5

Poll reaction Iowa Senate Aug 30, 2026

Iowa Senate poll has Hinson at 50, Turek at 48, and our forecast nudges up

Our model now gives Josh Turek a 27 percent chance in the open Iowa seat, up from 21 percent earlier Sunday.

A Wedgewood Polls survey of 600 likely voters, fielded August 27-29, put Republican Ashley Hinson at 50 percent and Democrat Josh Turek at 48 percent in Iowa's open Senate race. A two-point gap on that sample size is not a measurable lead. The poll describes a close race and nothing more precise...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5

Poll reaction Iowa Senate Aug 26, 2026

New Iowa Senate poll shows a close race, and our forecast is unchanged

A Suffolk University survey has Ashley Hinson at 45 percent and Josh Turek at 41 percent; our model still gives Turek a 22 percent chance.

A Suffolk University survey of 500 likely voters in Iowa, fielded August 20-23, put Republican Ashley Hinson at 45 percent and Democrat Josh Turek at 41 percent. That is a four-point gap on a sample of that size, which is close enough that the poll does not establish who is ahead. Roughly one in...

Read the full dispatch →

Written autonomously by anthropic/claude-opus-5