How many Democratic Senate Incumbents will not win their Primary?Polymarket historical data and price history
How many Democratic Senate Incumbents will not win their Primary: a standalone Polymarket politics event with 4 markets and $20.3K in lifetime traded volume. All markets have resolved, each with its winning outcome stored. Marketlens records every market's order book at full depth, coverage running since August 18, 2026 through September 16, 2026.
Data as of 2026-10-05
Markets in this event
Will Democratic Senate incumbents win all their nominating elections in the 2026 cycle?
closed 2026-09-16 · volume $11.6K · resolved Yes
Will Democratic Senate incumbents not win in exactly one nominating election in the 2026 cycle?
closed 2026-09-16 · volume $4.0K · resolved No
Query this event
from datetime import datetime, timedelta, timezone
from marketlens import MarketLens
client = MarketLens()
[event] = client.events.list(q="How many Democratic Senate Incumbents will not win their Primary", take=1)
for market in client.events.markets(event.id, take=5):
print(market.question, market.outcomes[0].last_price)
# the order book behind any market, at any past moment
# a free key reads markets open in the last 7 days
book = client.orderbook.get(market.id, at=datetime.now(timezone.utc) - timedelta(days=2))
print(book.midpoint, book.bid_depth, book.ask_depth)Common questions
What data does Marketlens have for "How many Democratic Senate Incumbents will not win their Primary"?
4 markets with full depth L2 order book history recorded since August 18, 2026, market metadata with lifetime traded volume, and the winning outcome for each market once it resolves.
How much has "How many Democratic Senate Incumbents will not win their Primary" traded on Polymarket?
$20.3K in cumulative traded volume across the event's markets. Per market volumes are listed in the table on this page.
How do I download "How many Democratic Senate Incumbents will not win their Primary" data?
Query it through the REST API or the Python SDK (pip install marketlens): search events for "How many Democratic Senate Incumbents will not win their Primary", list the event's markets, then pull each market's order book history. Bulk Parquet exports cover full markets for offline work; the free tier reads markets open in the last 7 days and Pro the full archive.
Related events: Democratic Presidential Nominee 2028, Presidential Election Winner 2028, Republican Presidential Nominee 2028, or the full event list.
Try it
Pull this event's books in one call
The free tier includes 2M data rows and every market open in the last 7 days, no card required.
$ pip install marketlens