base rate:
Historical base rate for politicians with expressed presidential ambition actually formally announcing is ~30-40%. For former House members without a current office, the rate is lower (~15-25%). MTG-specific factors (strong media brand, open field) push toward higher end.
evidence updates:
UP: Credible TIME/NOTUS reporting of private intent (+10% from base rate); open 2028 field (+5%); national media tour (+3%). DOWN: Resignation from Congress removes platform (-8%); falling out with Trump in a Trump-dominated MAGA movement is severe (-10%); public denials (-2%, weak signal).
combination method:
Weighted average of sub-questions gives 0.60, but this overstates the announcement probability because the sub-questions measure conditions/signals rather than the announcement itself. Translated through base rate lens: ambition signals are strong but conversion rate to formal announcement is ~40-50% even for those with strong signals, and MTG's Trump rupture further reduces this.
final:
Final estimate 30%. MTG has real ambition signals per multiple credible sources, and the field is open. But loss of her House seat, rupture with Trump, and base rates for former House members actually filing presidential campaigns all weigh significantly against formal announcement. The 20-month window through Jan 2028 captures most announcement timing, so temporal risk is low. Confidence is medium — the NOTUS/TIME reporting is strong but MTG's post-resignation trajectory is a major unknown.
ensemble:
{'ensemble_count': 3, 'perspectives': {'base_rate': {'p_yes': 0.3, 'confidence': 0.45}, 'evidence_driven': {'p_yes': 0.3, 'confidence': 0.45}, 'contrarian': {'p_yes': 0.32, 'confidence': 0.45}}, 'spread': 0.02, 'individual_p_yes': {'base_rate': 0.3, 'evidence_driven': 0.3, 'contrarian': 0.32}}