Graham Platner won Maine’s Democratic Senate primary on June 9, 2026, with roughly 72 percent of the vote after Governor Janet Mills suspended her campaign in late April and no other viable challengers emerged. He remained an active candidate through multiple rounds of negative headlines and public pressure, securing endorsements from progressive figures and demonstrating consistent polling and fundraising strength in the months leading up to the contest. Traders assign near-certain probability to “no” because the primary date has passed with Platner on the ballot and declared the nominee. The only realistic variables that could still shift resolution involve disputes over the precise timing of any last-minute withdrawal or formal party rules for nominee replacement after the vote, though no such developments have occurred.