Graham Platner Is Out. Maine Democrats Have 12 Days to Save Their Best Senate Pickup.

Five weeks ago, Graham Platner was the biggest Democratic primary story in the country — an oyster farmer and Marine veteran who beat Gov. Janet Mills 77.7% to 16.7% in Maine’s June 9 Senate primary, one of the most lopsided defeats of a sitting governor in modern primary history.

On July 10, he withdrew from the race.

Platner’s exit followed reporting by Politico and CNN in early July that a former romantic partner had accused him of sexually assaulting her in 2021. Platner denies the allegation, calling it “categorically false.” But the political verdict arrived faster than any legal one could: within days, Sens. Elizabeth Warren, Reps. Ro Khanna and Ruben Gallego, and — most painfully for a candidate who built his campaign in Bernie Sanders’ image — Sanders himself called for him to step aside. Senate Minority Leader Chuck Schumer and the DSCC went further, signaling the national party would not spend a dollar in Maine with Platner on the ballot.

Facing a unified party establishment, evaporating fundraising, and a general election against the most durable Republican incumbent in New England, Platner ended his campaign.

How the Replacement Works

Timing saved Maine Democrats from catastrophe. Platner formally withdrew before Maine’s July 13 statutory deadline, which means his name comes off the November ballot entirely and the party retains the legal right to substitute a new nominee. Had he waited even three more days, Democrats could have been stuck with a withdrawn candidate’s name printed on every ballot in the state.

The replacement mechanism is a state nominating convention of roughly 600 Democratic delegates, which must certify a new nominee by July 27. Prospective candidates had until July 15 — today — to declare and submit signatures from at least 8 of Maine’s 16 counties.

The striking pattern: three of the six contenders just lost the governor’s primary. Shah, Bellows, and Jackson all fell to Pingree in June’s five-day ranked-choice tabulation — and each already has a statewide campaign apparatus, name recognition, and donor lists that can be reactivated in days rather than months. That’s precisely what a 99-day general election campaign requires.

The Timeline From Here

What This Means for Susan Collins

Collins, seeking a sixth term at 73, enters the chaos with roughly $10 million cash on hand and the only thing better than a weak opponent: no opponent at all, for at least two more weeks.

But the deeper picture is more complicated than the headline. Before the allegation surfaced, Platner had been leading Collins in public polling by around 7 points — remarkable against an incumbent who has never lost a Senate race and famously outperformed every 2020 poll to win by 9. The lead reflected a structural reality that hasn’t changed: Maine voted for Kamala Harris by 7 points in 2024, Trump’s net approval sits at −17 nationally, and the July NYT/Siena battleground series found him underwater in Maine specifically.

A replacement nominee without Platner’s baggage — and each of the leading contenders has been vetted by at least one statewide campaign — inherits that favorable environment with none of the scandal. The counterargument: they also inherit a fractured primary electorate that chose an outsider over the entire party establishment by 61 points, and a compressed 99-day runway against an incumbent who has won six-year terms in four different political eras.

Ranked-choice voting adds the final wildcard. Maine applies RCV to its federal general elections, which historically has helped consolidate the anti-incumbent vote — it’s how Jared Golden first unseated Bruce Poliquin in 2018.

The Senate Math

Democrats need a net gain of four seats for a majority. Their most credible path runs through North Carolina (Lean D), Georgia (Lean D, defending Ossoff), Maine, Ohio, Iowa, Texas, Alaska, and Nebraska — and Maine has long been penciled in as one of the two or three likeliest flips. Prediction markets gave Republicans a 56% chance of holding the chamber as of mid-June; the Maine vacancy is now the single biggest variable in that number.

If the convention produces a clean nominee by July 27 and the party consolidates quickly, Maine stays a genuine toss-up. If the convention fight turns bitter — three gubernatorial primary rivals competing for 600 delegates two months after facing each other — Collins could bank the seat by Labor Day.

We’ll publish a full breakdown of the convention result the day it’s decided. Until then, the live Senate map has the race rated Toss-Up — in flux.