Upset Brief · OR-01 · Barbara Kahl (R) vs. Suzanne Bonamici (D), incumbent
A long shot on the math: it takes a 32.4-point national wave.
0%
odds today
0%
odds with the plan
116,461
net votes to find
36
days left; voting starts October 14
Where
- 01+284Precinct 2804 (Multnomah County)Starting line Bonamici +69. 9.0% split their ticket.
- 02+235Precinct 3304 (Multnomah County)Starting line Bonamici +71. 6.9% split their ticket.
- 03+212Precinct 2805 (Multnomah County)Starting line Bonamici +70. 5.6% split their ticket.
- 04+208Precinct 362 (Washington County)Starting line Bonamici +44. 6.4% split their ticket.
- 05+207Precinct 340 (Washington County)Starting line Bonamici +11. 5.5% split their ticket.
- 06+207Precinct 364 (Washington County)Starting line Bonamici +43. 9.6% split their ticket.
The top 12 precincts carry 22% of the plan.
How
- P+9,108Persuade9,108 voters who split their ticket in recent elections and lean Bonamici today.
- M+197MobilizeAt least 2,575 people who voted in 2024 but not in 2022, in precincts where Kahl's side wins at least 55 percent.
- C+1,693ConsolidateVoters who went third party in recent races, in the precincts that lean Kahl's way.
Plus a national shift of 32.4 points of margin (105,462 votes) that no campaign controls.
What has to be true
- Kahl wins 50 percent of the ticket splitters now leaning Bonamici.
- It would take a national shift of about 32.4 points toward Kahl's side, larger than any midterm swing in recent memory.
- No 2026 public poll exists for this race, so the starting line is a weighted blend of official recent results; the first real poll will move it.
The numbers behind it
- 01Crossover regression215 precincts, R² 0.996, 36 crossover precincts identified
- 02Monte Carlo20,000 seeded simulated elections with a 7-point baseline error. 90% range of the final margin with the plan: -142,916 to -67,550 votes.
- 03Money, FEC candidate totals through June 30Kahl $212 cash on hand; Bonamici $572,435.
- 04Call program for this list17,684 households, 53,053 dials, about 2,780 live conversations: an estimated $6,573 at published rates.
Independent analysis by The Political Group from official Oregon Secretary of State precinct returns (2022 and 2024), FEC filings and published polls, as of September 27, 2026. Not affiliated with any candidate or party.