Horizon · our Election Day forecast: polls, plus fundamentals like incumbency, fundraising and past results.

Pulse · polls only: where the races stand today, with no fundamentals and wider uncertainty.

What's the difference?

Illinois › Governor · November 3, 2026 · Updated Oct 16, 2026

Illinois Governor

Pritzker is very likely to win: Pritzker wins in more than 99 of every 100 simulations.

Pritzker (D)
99%
chance of winning
Bailey (R)
1%
Average margin
D+19.3
80% of outcomes
D+11 to D+28
Partisan lean
D+13
Polls
2in our database

Pritzker is very likely to win: Pritzker wins in more than 99 of every 100 simulations.

Pritzker (D)
99%
chance of winning
Bailey (R)
1%
Average margin
D+19.9
80% of outcomes
D+11 to D+30
Partisan lean
D+13
Polls
2in our database

Range of outcomes

D+19.3R+40R+20EvenD+20D+40
D+19.9R+40R+20EvenD+20D+40

How the odds have moved

Chance of winning by forecast date.

0%25%50%75%100%AugSepOctNovNov 3Pritzker 99%Bailey 1%

Updated nightly. Each day is the current model run on the polls that had ended by then (how).

0%25%50%75%100%AugSepOctNovNov 3Pritzker 99%Bailey 1%

Updated nightly. Each day is the current model run on the polls that had ended by then (how).

The candidates

Republican

Darren Bailey

Former state senator from the 55th district (2021–2023), nominee for governor in 2022, and candidate for Illinois's 12th congressional district in 2024

Experience
State legislature

Profile and career · Wikipedia

What goes into the forecast

Every ingredient's estimate of the final margin.

National environment
D+9.5Election Day forecast
Illinois state offices
+0.1Polls for governor, statewide and legislative races, without this race · details
Environment here
D+9.6Used by the fundamentals
← RepublicanDemocratic →Lean + environmentUsual vote, shifted by the national and state moodD+22.0Fundamentals modelAdds incumbency, past results, money andexperienceD+19.8Polls in similar placesPolling of similar races in Illinois andlook-alike placesD+19.9Polling average2 polls, latest Oct 1D+19.0Horizon forecastPolls + fundamentals, projected to Election DayD+19.3Pulse forecastPolls (and polling of similar places) only, todayD+19.9

Each estimate is a margin before national and statewide uncertainty is simulated. Horizon blends polls, fundamentals and a little of the similar-places estimate, weighting each by how precise it is; Pulse uses polls and similar places only.

Fundamentals inputs
Incumbency (+1 D, −1 R)1
Fundraising edge (log ratio of individual money)0
Elected-experience edge0.33
First-term incumbent0
Seat's last result vs. expectation2.07
Incumbent's last result vs. expectation2.07

Polls

R+20R+10EvenD+10D+20Avg. D+19.0Nov 24Nov 3
All 2 polls
PollsterDatesSamplePritzkerBaileyMarginAdjusted
Public Policy Polling for Chicago News WeeklyD-sponsoredSep 30–Oct 1569 LV5434D+20D+19.0
Victory ResearchNov 20–Nov 241,208 LV5434D+20D+24.8

Adjusted: after correcting for the pollster's house effect, registered vs. likely voters, and movement in the national environment since the poll; shown for the polls carrying the most weight in today's average. Larger dots in the chart carry the most weight. Last poll: Oct 1, 2026.

The state

Lean D+13: how much more Democratic or Republican than the nation it votes for president.

Presidential vote

← RepublicanDemocratic →2016 presidentD+18.0D+15.8 vs. nation2020 presidentD+17.3D+12.8 vs. nation2024 presidentD+11.1D+12.6 vs. nation

Who lives here

Population
12,694,798
Adults with a B.A.+
38%
White, no degree
36%of adults
  • White 58%
  • Hispanic 19%
  • Black 13%
  • Asian 6%
  • Other / multiracial 4%

American Community Survey 2020–2024, aggregated from census tracts.

Past results

2024 President Vote in this state

5,511,942 two-party votes · D+11.1 · D+12.6 vs. the nation
✓ Kamala Harris (D)55.6%
Donald Trump (R)44.4%

2022

4,106,208 votes · D+12.9
✓ Jb Pritzker (D)54.9%
Darren Bailey (R)42.4%
Scott Schluter (L)2.7%

2020 President Vote in this state

5,918,806 two-party votes · D+17.3 · D+12.8 vs. the nation
✓ Joe Biden (D)58.7%
Donald Trump (R)41.3%

2018

4,560,012 votes · D+16.8
✓ Jb Pritzker (D)54.4%
Bruce Rauner (R)38.7%
William "sam" McCann (OTH)4.2%
Grayson Kash Jackson (L)2.4%

2016 President Vote in this state

5,236,744 two-party votes · D+18.0 · D+15.8 vs. the nation
✓ Hillary Clinton (D)59.0%
Donald Trump (R)41.0%

2014

3,504,970 votes · R+4.1
✓ Bruce Rauner (R)52.0%
Pat Quinn (D)48.0%

2010

3,729,746 votes · D+0.9
✓ Pat Quinn (D)46.8%
Bill Brady (R)45.9%
Scott Lee Cohen (I)3.6%
Rich Whitney (G)2.7%
Lex Green (L)0.9%

2006

3,467,382 votes · D+11.8
✓ Rod Blagojevich (D)50.1%
Judy Baar Topinka (R)39.5%
Rich Whitney (G)10.4%

2002

3,442,000 votes · D+7.3
✓ Rod R. Blagojevich (D)53.7%
Jim Ryan (R)46.3%