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?

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

Oklahoma Governor

Mazzei is clearly favored to win: Mazzei wins in 9 of every 10 simulations.

Munson (D)
9%
chance of winning
Mazzei (R)
91%
Average margin
R+17.2
80% of outcomes
R+34 to R+1
Partisan lean
R+35
Polls
No pollsmodel only

Mazzei is very likely to win: Mazzei wins in 49 of every 50 simulations.

Munson (D)
3%
chance of winning
Mazzei (R)
97%
Average margin
R+26.5
80% of outcomes
R+43 to R+11
Partisan lean
R+35
Polls
No pollsmodel only

Range of outcomes

R+17.2R+60R+40R+20EvenD+20D+40D+60
R+26.5R+60R+40R+20EvenD+20D+40D+60

How the odds have moved

Chance of winning by forecast date.

0%25%50%75%100%AugSepOctNovNov 3Munson 9%Mazzei 91%

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

0%25%50%75%100%AugSepOctNovNov 3Munson 3%Mazzei 97%

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

The candidates

Republican

Mike Mazzei

Former Oklahoma Secretary of Budget (2019–2020), former state senator from the 25th district (2004–2016), and candidate for state treasurer in 2022

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
Oklahoma state offices
−0.3Polls for governor, statewide and legislative races · details
Environment here
D+9.2Used by the fundamentals
← RepublicanDemocratic →Lean + environmentUsual vote, shifted by the national and state moodR+24.1Fundamentals modelAdds incumbency, past results, money andexperienceR+16.5Polls in similar placesPolling of similar races in Oklahoma andlook-alike placesR+17.4Polling averageNo polls of this racenot availableHorizon forecastPolls + fundamentals, projected to Election DayR+17.0Pulse forecastPolls (and polling of similar places) only, todayR+26.3

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)0
Fundraising edge (log ratio of individual money)0
Elected-experience edge0
First-term incumbent0
Seat's last result vs. expectation27.69
Incumbent's last result vs. expectation0

Polls

No public polls of this race. The forecast relies on fundamentals and on polling of similar places.

The state

Lean R+35: how much more Democratic or Republican than the nation it votes for president.

Presidential vote

← RepublicanDemocratic →2016 presidentR+38.6R+40.8 vs. nation2020 presidentR+33.9R+38.4 vs. nation2024 presidentR+34.9R+33.4 vs. nation

Who lives here

Population
4,028,634
Adults with a B.A.+
28%
White, no degree
47%of adults
  • White 62%
  • Hispanic 13%
  • Black 7%
  • Asian 2%
  • Other / multiracial 16%

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

Past results

2024 President Vote in this state

1,535,812 two-party votes · R+34.9 · R+33.4 vs. the nation
✓ Donald Trump (R)67.5%
Kamala Harris (D)32.5%

2022

1,153,284 votes · R+14.1
✓ Kevin Stitt (R)55.4%
Joy Hofmeister (D)41.8%
Natalie Bruno (L)1.4%
Ervin Stone Yen (OTH)1.4%

2020 President Vote in this state

1,524,170 two-party votes · R+33.9 · R+38.4 vs. the nation
✓ Donald Trump (R)66.9%
Joe Biden (D)33.1%

2018

1,186,385 votes · R+12.5
✓ Kevin Stitt (R)54.3%
Drew Edmondson (D)42.2%
Chris Powell (L)3.4%

2016 President Vote in this state

1,369,511 two-party votes · R+38.6 · R+40.8 vs. the nation
✓ Donald Trump (R)69.3%
Hillary Clinton (D)30.7%

2014

798,537 votes · R+15.3
✓ Mary Fallin (R)57.6%
Joe Dorman (D)42.4%

2010

1,034,767 votes · R+20.9
✓ Mary Fallin (R)60.4%
Jari Askins (D)39.6%

2006

926,462 votes · D+33.0
✓ Brad Henry (D)66.5%
Ernest J. Istook (R)33.5%

2002

1,035,620 votes · D+0.8
✓ Brad Henry (D)43.3%
Steve Largent (R)42.6%
Gary Richardson (I)14.1%