Helm

OH-15 House forecast

Likely Rep2026 lines

Polls close

Carey 71% chance

  • Don Leonard (D)+3% past 7 days27%
  • Mike Carey (R)-3% past 7 days71%

Chance over time

  • Leonard27%
  • Carey71%

Chance over time, past month: Leonard from 25% to 27%; Carey from 76% to 71%.

Chance over time, past month, weekly
DateLeonardCarey
Sep 22, 202624%76%
Sep 29, 202623%78%
Oct 6, 202624%75%
Oct 14, 202624%74%
Oct 21, 202627%71%

Projected margin

Most likely Carey by 3–6 · 8 in 10: Carey +13 to Leonard +2.9

Margin forecast from public sources, collected by Helm's data infrastructure
Projected margin of victory
MarginChance
Carey by 18+3%
Carey by 15–184%
Carey by 12–154%
Carey by 9–1214%
Carey by 6–917%
Carey by 3–620%
Carey by 0–317%
Leonard by 0–311%
Leonard by 3–65%
Leonard by 6+5%

Helm simulation

In simulated elections where Leonard wins, Democrats win the House in 97 of 100. Where Carey wins, in 89 of 100.

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Context

  • New lines for 2026: the current OH-15 member was elected on different lines.

More in Ohio

14 more House districts

News and signals

House
92% DEM
Senate
65% DEM