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?

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

Maryland's 1st District

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

Schwartz (D)
3%
chance of winning
Harris (R)
97%
Average margin
R+12.9
80% of outcomes
R+21 to R+5
Partisan lean
R+17
Polls
1in our database

Harris is very likely to win: Harris wins in 19 of every 20 simulations.

Schwartz (D)
5%
chance of winning
Harris (R)
95%
Average margin
R+13.3
80% of outcomes
R+23 to R+4
Partisan lean
R+17
Polls
1in our database

Range of outcomes

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

R+12.9R+30R+20R+10EvenD+10D+20D+30
R+13.3R+30R+20R+10EvenD+10D+20D+30

How the odds have moved

Chance of winning by forecast date.

0%25%50%75%100%AugSepOctNovNov 3Schwartz 3%Harris 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 3Schwartz 5%Harris 95%

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

The candidates

Democratic

Dan Schwartz

Consumer advocate

Experience
No elected office
Raised
$695.2K
From individuals
$668K
Spent
$622.6K
Cash on hand
$72.6K

Money: FEC, through Jun 30, 2026.

Profile and career

RepublicanIncumbent

Andy Harris

Incumbent U.S. representative

Experience
Statewide office or Congress
Raised
$2.6M
From individuals
$2.1M
Spent
$2.1M
Cash on hand
$1.3M

Money: FEC, through Sep 30, 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
Mid-Atlantic 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 Mid-Atlantic adjustmentR+8.6Fundamentals modelAdds incumbency, past results, money andexperienceR+10.2Polls in similar placesPolling of similar races in Maryland andlook-alike placesR+9.6Polling average1 poll, latest Jul 27R+17.6Horizon forecastPolls + fundamentals, projected to Election DayR+12.9Pulse forecastPolls (and polling of similar places) only, todayR+13.3

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)-1
Fundraising edge (log ratio of individual money)-0.97
Elected-experience edge-1
First-term incumbent0
Seat's last result vs. expectation-3.27
Incumbent's last result vs. expectation-3.27

Polls

R+10EvenD+10Avg. R+17.6Jul 27Nov 3
All 1 polls
PollsterDatesSampleSchwartzHarrisMarginAdjusted
Z to A Research for Schwartz's campaignD-sponsoredJul 23–Jul 27482 LV3952R+13R+17.6

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: Jul 27, 2026.

The district

Lean R+17: how much more Democratic or Republican than the nation it votes for president.

Presidential vote

← RepublicanDemocratic →2016 presidentR+24.5R+26.7 vs. nation2020 presidentR+13.5R+18.0 vs. nation2024 presidentR+17.3R+15.8 vs. nation

Precinct results re-aggregated to the current district lines.

Who lives here

Population
793,028
People per km²
56
Adults with a B.A.+
35%
White, no degree
48%of adults
  • White 71%
  • Hispanic 6%
  • Black 15%
  • Asian 2%
  • 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

414,680 votes · R+22.8
✓ Andy Harris (R)59.4%
Blane H. Miller III (D)37.4%
Joshua W. O’brien (L)3.1%

2024 President Vote in this district

415,550 two-party votes · R+17.3 · R+15.8 vs. the nation
✓ Donald Trump (R)58.6%
Kamala Harris (D)41.4%

2022

293,358 votes · R+11.6
✓ Andy Harris (R)54.4%
Heather R Mizeur (D)43.1%
Daniel Frank Thibeault (L)2.4%

2020 Earlier district lines

395,524 votes · R+27.1
✓ Andy Harris (R)63.4%
Mia Mason (D)36.4%

2020 President Vote in this district

445,088 two-party votes · R+13.5 · R+18.0 vs. the nation
✓ Donald Trump (R)56.8%
Joe Biden (D)43.2%

2018 Earlier district lines

306,186 votes · R+22.3
✓ Andy Harris (R)60.0%
Jesse Colvin (D)38.1%
Jenica Martin (L)1.9%

2016 Earlier district lines

362,093 votes · R+40.1
✓ Andy Harris (R)67.0%
Joe Werner (D)28.6%
Matt Beers (L)4.2%

2016 President Vote in this district

354,712 two-party votes · R+24.5 · R+26.7 vs. the nation
✓ Donald Trump (R)62.2%
Hillary Clinton (D)37.8%