Democratic nomination odds leader on October 31?Polymarket historical data and price history
Democratic nomination odds leader on October 31: a standalone Polymarket politics event with 9 markets and $94.7K in lifetime traded volume. 5 markets are trading. Marketlens records every market's order book at full depth, coverage running since October 14, 2026.
Data as of 2026-10-19
Top 5 of 9 markets
Gavin Newsom Democratic nomination odds leader on October 31?
closes 2026-10-31 · volume $23.6K · last price 41.5%
Alexandria Ocasio-Cortez Democratic nomination odds leader on October 31?
closes 2026-10-31 · volume $20.3K · last price 28.0%
Jon Ossoff Democratic nomination odds leader on October 31?
closes 2026-10-31 · volume $47.6K · last price 26.5%
Query this event
from datetime import datetime, timedelta, timezone
from marketlens import MarketLens
client = MarketLens()
[event] = client.events.list(q="Democratic nomination odds leader on October 31", 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
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 "Democratic nomination odds leader on October 31"?
9 markets with full depth L2 order book history recorded since October 14, 2026, market metadata with lifetime traded volume, and the winning outcome for each market once it resolves.
How much has "Democratic nomination odds leader on October 31" traded on Polymarket?
$94.7K in cumulative traded volume across the event's markets. Per market volumes are listed in the table on this page.
How do I download "Democratic nomination odds leader on October 31" data?
Query it through the REST API or the Python SDK (pip install marketlens): search events for "Democratic nomination odds leader on October 31", 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