Senát 2026 · forecast

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District 18 — Příbram

incumbent running  As of 2026-10-09 · Stage: blind (no odds) · v1

Round-1 result

counted 100 % · Source: ČSÚ (volbyhned.cz)

CandidateParty / backingVotesShare
Petr ŠtěpánekSTAN23 30543.70 %
Barbora DaňhováANO13 44625.21 %
Simona LuftováZelení+Piráti6 43612.07 %
Josef ŠornaSPD+PRO5 0139.40 %
Frank Thomas Podstatzky-LichtensteinČZS3 1065.82 %
Pavel VermachSMS2 0143.77 %

Round-2 forecasts (16–17 Oct)

Probability of winning the runoff. Scored separately from the freeze; the freeze (9 Oct) is scored on the final winner.

CandidateAIStatistical modelAI + modelBettingAI + bettingSTEM (CNN Prima)Seznam Zprávy
Petr Štěpánek93 %97 %96 %99 %98 %99 %99 %
Barbora Daňhová7 %3 %4 %1 %2 %1 %1 %

AI: v2 · AI + model: v2 · Odds contamination risk: none

Before the election — scored freeze (9 Oct)

CandidateAIStatistical modelAI + modelBettingAI + betting
Petr Štěpánek74 %80 %82 %90 %88 %
Barbora Daňhová23 %6 %13 %5 %7 %
Simona Luftová1 %7 %2 %3 %3 %
Josef Šorna1 %3 %2 %1 %1 %
Others1 %5 %2 %1.0 %1 %

AI agent (blind) — Before the election — scored freeze (9 Oct)

CandidateParty / backingP(win)Band
Petr ŠtěpánekSTAN74 %60–84 %
Barbora DaňhováANO23 %13–36 %
Simona LuftováZelení+Piráti (navrhl/a Piráti)1 %0–4 %
Josef ŠornaSPD+PRO (navrhl/a PRO)1 %0–3 %
Others1 %0–2 %

Other candidates on the ballot: Pavel Vermach (SMS), Frank Thomas Podstatzky-Lichtenstein (ČZS). Candidates and lists per the official ČSÚ register (volby.gov.cz).

AI agent (blind) vs. Statistical model

CandidateParty / backingAI agent (blind)Statistical modelRound-1 share (model, 80% interval)P(advance / win round 1)
Petr ŠtěpánekSTAN74 %80 %38 % (29–47)99 %
Simona LuftováZelení+Piráti1 %7 %12 % (4–20)10 %
Barbora DaňhováANO23 %6 %22 % (14–30)70 %
Pavel VermachSMSin “others”3 %9 % (0–17)4 %
Josef ŠornaSPD+PRO1 %3 %10 % (1–18)6 %
Frank Thomas Podstatzky-LichtensteinČZSin “others”3 %9 % (0–17)4 %

AI agent (blind) — Others: 1 %. The model cannot see candidates with neither party nor municipal base (new movements, personal brand) — it underrates them. Model →

Why

The blocs are roughly level locally (2024 regional vote), but ANO loses ground in runoffs.

What to watch

If Daňhová leads after round 1, Štěpánek drops to ~60 %.

Run limitations