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

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What's the difference?

Tennessee › U.S. House of Representatives · November 3, 2026 · Updated Oct 16, 2026

Tennessee's 4th District

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

Broderick (D)
3%
chance of winning
DesJarlais (R)
97%
Average margin
R+13.7
80% of outcomes
R+23 to R+5
Partisan lean
R+22
Polls
No pollsmodel only

DesJarlais is clearly favored to win: DesJarlais wins in 19 of every 20 simulations.

Broderick (D)
5%
chance of winning
DesJarlais (R)
95%
Average margin
R+15.0
80% of outcomes
R+27 to R+4
Partisan lean
R+22
Polls
No pollsmodel only

Range of outcomes

Final margin across our simulations; the white dashes mark the middle 80%.

R+13.7R+30R+20R+10EvenD+10D+20D+30
R+15.0R+40R+20EvenD+20D+40

How the odds have moved

Chance of winning by forecast date.

0%25%50%75%100%AugSepOctNovNov 3Broderick 3%DesJarlais 97%

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

0%25%50%75%100%AugSepOctNovNov 3Broderick 5%DesJarlais 95%

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

The candidates

RepublicanIncumbent

Scott DesJarlais

Incumbent U.S. representative

Experience
Statewide office or Congress
Raised
$536.8K
From individuals
$228.8K
Spent
$407.7K
Cash on hand
$495.1K

Money: FEC, through Jul 17, 2026.

Profile and career · Wikipedia

What goes into the forecast

Every ingredient's estimate of the final margin.

National environment
D+9.5Election Day forecast; federal races run in it
Swing reaching this office
78%Of a shift in the environment, from past House races since 2016
Upper South adjustment
+0.5How House races in the region have run against lean and environment lately
← RepublicanDemocratic →Lean + environmentUsual vote, shifted by 78% of the environment andthe Upper South adjustmentR+13.4Fundamentals modelAdds incumbency, past results, money andexperienceR+13.8Polls in similar placesPolling of similar races in Tennessee andlook-alike placesR+13.6Polling averageNo polls of this racenot availableHorizon forecastPolls + fundamentals, projected to Election DayR+13.7Pulse forecastPolls (and polling of similar places) only, todayR+15.0

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)-0.48
Elected-experience edge-1
First-term incumbent0
Seat's last result vs. expectation0
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 district

Lean R+22: how much more Democratic or Republican than the nation it votes for president.

Presidential vote

← RepublicanDemocratic →2016 presidentR+21.1R+23.4 vs. nation2020 presidentR+15.9R+20.4 vs. nation2024 presidentR+24.3R+22.8 vs. nation

Precinct results re-aggregated to the current district lines.

Who lives here

Population
787,648
People per km²
72
Adults with a B.A.+
31%
White, no degree
47%of adults
  • White 65%
  • Hispanic 13%
  • Black 15%
  • Asian 3%
  • Other / multiracial 5%

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

Past results

Results in the same-numbered district; earlier elections may have used different lines.

2024 Earlier district lines

313,255 votes · R+44.7
✓ Scott Desjarlais (R)70.0%
Victoria Isabel Broderick (D)26.8%
Keith Nolan (I)1.8%
Earnest Ensley (I)1.5%

2024 President Vote in this district

301,475 two-party votes · R+24.3 · R+22.8 vs. the nation
✓ Donald Trump (R)62.1%
Kamala Harris (D)37.9%

2022 Earlier district lines

173,437 votes · R+46.5
✓ Scott Desjarlais (R)70.6%
Wayne Steele (D)25.7%
Mike Winton (I)1.6%
Clyde Benson (I)1.0%

2020 Earlier district lines

335,710 votes · R+33.3
✓ Scott Desjarlais (R)66.7%
Christopher J Hale (D)33.3%

2020 President Vote in this district

301,514 two-party votes · R+15.9 · R+20.4 vs. the nation
✓ Donald Trump (R)57.9%
Joe Biden (D)42.1%

2018 Earlier district lines

232,451 votes · R+30.7
✓ Scott Desjarlais (R)63.4%
Mariah Phillips (D)33.6%
Michael Shupe (I)3.0%

2016 Earlier district lines

254,937 votes · R+30.1
✓ Scott Desjarlais (R)65.0%
Steven Reynolds (D)35.0%

2016 President Vote in this district

230,563 two-party votes · R+21.1 · R+23.4 vs. the nation
✓ Donald Trump (R)60.6%
Hillary Clinton (D)39.4%