{
 "question": "Will the margin of victory for Ed Markey in the 2026 Massachusetts Democratic Senate primary be at least 30%?",
 "url": "https://themorningline.news/odds/will-the-margin-of-victory-for-ed-markey-in-the-2026-massachusetts",
 "category": "politics",
 "as_of": "2026-09-03",
 "first_tracked": "2026-09-01",
 "license": "CC BY 4.0 — free to reuse with a link back",
 "note": "Probabilities are market-consensus forecasts (0-1). Rows with source 'backfill' are pre-tracking reference history from the market's own records, never published by us.",
 "outcomes": [
  {
   "name": "Ed Markey, ≥30%",
   "history": [
    {
     "date": "2026-09-01",
     "probability": 0.45,
     "source": "tracked"
    },
    {
     "date": "2026-09-02",
     "probability": 0.08,
     "source": "tracked"
    },
    {
     "date": "2026-09-03",
     "probability": 0.085,
     "source": "tracked"
    }
   ]
  }
 ]
}