Dru Koester
Lost the 2026 race for Montana Senate District 41.
- Last margin
- −31.0
- Lost 2026
Source: Wikidata, congress-legislators and Open States; 99chambers legislative records
Background
As listed by the official candidate list, Wikidata and campaign filings. 99chambers does not summarize platforms or endorsements.
- On the ballot as
- businessowner
Every race Koester has run
Margin: how far Koester finished ahead of (+) or behind (−) the runner-up.
| Year | Office | Stage | Result | Opponents | Share | Margin | Raised |
|---|---|---|---|---|---|---|---|
| 2026 | Montana Senate District 41 | General | Lost | Erin Farris-Olsen (D) | 34.5% | −31.0 | $2.5K |
Source: 99chambers results archive; 2026: Montana Secretary of State (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Money
Koester’s campaign fundraising.
- Raised, 2025–26
- $2.5K
Source: Montana Commissioner of Political Practices filings through Sep 17, 2026Updated Nov 1, 2026, 9:16 AM ET
What’s next
From campaign filings, not from public statements.
| Koester, Dru State | Active |
Source: Montana Commissioner of Political Practices filings through Sep 17, 2026Updated Nov 1, 2026, 9:16 AM ET
Who Koester has run against
- Erin Farris-Olsen (D) · 2026 general, lost
Source: 99chambers results archive; 2026: Montana Secretary of State (unofficial)
The seat
- Montana Senate District 41 · lean D+5.6 · 14th most Democratic of 50
Source: 99chambers: presidential results on current lines (MEDSL precinct returns)