Trader consensus on Polymarket heavily favors Graham Platner as the Maine Democratic Senate primary winner on June 9, with 88.5% implied probability reflecting his double-digit leads in recent polls, including an Emerson College survey from late March showing him at 55% to Gov. Janet Mills' 28% in first-round ranked-choice voting. Platner's momentum as a combat veteran and political newcomer has surged via endorsements from Sen. Elizabeth Warren and other senators, strong backing from working-class and independent voters, and ballot qualification on March 3, while Mills' aggressive attacks on his past social media posts have not closed the gap. Establishment support for Mills from Senate Minority Leader Chuck Schumer underscores the intra-party proxy battle, but polls consistently position Platner as the frontrunner absent major shifts before the primary.
Experimental AI-generated summary referencing Polymarket data · UpdatedMaine Democratic Senate Primary Winner
Maine Democratic Senate Primary Winner
Graham Platner 89%
Janet Mills 11%
Troy Jackson <1%
Dan Kleban <1%
$2,098,978 Vol.
$2,098,978 Vol.
Graham Platner
89%
Janet Mills
11%
Dan Kleban
<1%
Chellie Pingree
<1%
Jordan Wood
<1%
Troy Jackson
<1%
Jared Golden
<1%
Graham Platner 89%
Janet Mills 11%
Troy Jackson <1%
Dan Kleban <1%
$2,098,978 Vol.
$2,098,978 Vol.
Graham Platner
89%
Janet Mills
11%
Dan Kleban
<1%
Chellie Pingree
<1%
Jordan Wood
<1%
Troy Jackson
<1%
Jared Golden
<1%
If no 2026 Maine Democratic Senate Primary takes place, this market will resolve to "Other".
The resolution source for this market will be the first announcement of the results from the Maine Democratic party, however an overwhelming consensus of credible reporting may suffice.
Market Opened: Sep 15, 2025, 3:40 PM ET
Resolver
0x2F5e3684c...If no 2026 Maine Democratic Senate Primary takes place, this market will resolve to "Other".
The resolution source for this market will be the first announcement of the results from the Maine Democratic party, however an overwhelming consensus of credible reporting may suffice.
Resolver
0x2F5e3684c...Trader consensus on Polymarket heavily favors Graham Platner as the Maine Democratic Senate primary winner on June 9, with 88.5% implied probability reflecting his double-digit leads in recent polls, including an Emerson College survey from late March showing him at 55% to Gov. Janet Mills' 28% in first-round ranked-choice voting. Platner's momentum as a combat veteran and political newcomer has surged via endorsements from Sen. Elizabeth Warren and other senators, strong backing from working-class and independent voters, and ballot qualification on March 3, while Mills' aggressive attacks on his past social media posts have not closed the gap. Establishment support for Mills from Senate Minority Leader Chuck Schumer underscores the intra-party proxy battle, but polls consistently position Platner as the frontrunner absent major shifts before the primary.
Experimental AI-generated summary referencing Polymarket data · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions