Senát 2026 · forecast

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District 3 — Cheb

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

Round-1 result

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

CandidateParty / backingVotesShare
Miroslav PlevnýSTAN13 65940.08 %
Sandra TsoukernikANO9 22727.08 %
Štěpánka ČernáVOK4 19412.30 %
Vladimír KeblúšekNČ3 61710.61 %
Ivan ReisSPD2 1866.41 %
Pavel HojdaKSČM1 1903.49 %

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
Miroslav Plevný89 %96 %94 %99 %98 %99 %92 %
Sandra Tsoukernik11 %4 %6 %1 %2 %1 %8 %

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

Before the election — scored freeze (9 Oct)

CandidateAIStatistical modelAI + modelBettingAI + betting
Miroslav Plevný81 %62 %74 %40 %52 %
Sandra Tsoukernik16 %18 %18 %54 %41 %
Štěpánka Černá2 %6 %3 %3 %3 %
Others1 %14 %5 %3 %4 %

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

CandidateParty / backingP(win)Band
Miroslav PlevnýSTAN81 %68–88 %
Sandra TsoukernikANO16 %10–29 %
Štěpánka ČernáVOK2 %1–5 %
Others1 %0–3 %

Other candidates on the ballot: Vladimír Keblúšek (NČ), Pavel Hojda (KSČM), Ivan Reis (SPD). 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)
Miroslav PlevnýSTAN81 %62 %33 % (25–41)97 %
Sandra TsoukernikANO16 %18 %27 % (19–35)88 %
Ivan ReisSPDin “others”6 %12 % (4–20)5 %
Štěpánka ČernáVOK2 %6 %11 % (3–19)4 %
Pavel HojdaKSČMin “others”4 %9 % (0–16)2 %
Vladimír KeblúšekNČin “others”3 %9 % (0–16)2 %

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

Incumbent with broad coalition backing; won the 2020 runoff 70–30. ANO has a strong base but a weak long-run runoff record.

What to watch

Round-1 order: if Tsoukernik leads by 5+ pp, Plevný drops to ~55–62 %.

Run limitations