Democrat Graham Platner and Sen. Susan Collins (R-ME) are headed toward what is expected to be one of the most closely watched Senate races of 2026 after both candidates secured their respective nominations Tuesday night.
Platner advanced in the Democratic primary with 74.7% of the vote and 10% of ballots counted, according to the Associated Press as of 9:23 p.m. Tuesday night.
The matchup will test whether Collins’s carefully cultivated brand as an independent Republican can withstand growing Democratic anger toward President Donald Trump and whether Platner’s anti-establishment appeal can overcome a steady stream of personal controversies that have threatened to derail his candidacy.
Platner, a 41-year-old Marine veteran and oysterman, emerged from the Democratic primary after Gov. Janet Mills suspended her campaign in April, effectively clearing the path for his nomination. Collins cruised to renomination as she seeks a sixth term that would make her Maine’s longest-serving member of the Senate.
The race immediately becomes one of Democrats’ top pickup opportunities in a cycle that could determine control of the Senate. Collins is the only Republican senator representing a state carried by Democratic presidential nominee Kamala Harris in 2024, and national Democrats have long viewed Maine as one of the few places where a moderate Republican incumbent could be vulnerable in the Trump era. But Collins has repeatedly defied political gravity.
Despite facing intense opposition and millions in outside spending, the longtime senator has won five Senate races without a Democratic challenger surpassing 44% of the vote. In 2020, Collins secured reelection by nearly 9 percentage points over Democrat Sara Gideon even as Joe Biden carried the state and public polling consistently showed the Republican trailing throughout much of the campaign. Now, however, Collins enters a markedly different political environment.
Republicans nationwide are facing renewed backlash tied to several Trump administration policies, and Democrats are expected to aggressively tie Collins to the president despite her history of occasionally breaking with him. Collins voted to convict Trump following his second impeachment trial and opposed Pete Hegseth’s nomination for war secretary, helping reinforce her reputation as one of the Senate GOP’s more independent voices.
Still, Democrats argue those moments are overshadowed by the times Collins aligned with Republicans on the issues that mattered most to the party’s base, particularly her vote to confirm Supreme Court Justice Brett Kavanaugh, which cemented the conservative majority that later overturned Roe v. Wade.
Platner has attempted to harness frustration with both political parties into an insurgent-style campaign that has rapidly gained traction across Maine. His rallies have drawn sizable crowds from small coastal towns to inland communities, while his campaign has brought in an influx of grassroots donations from both in-state supporters and national progressives eager to flip the seat.
The Democrat has centered his candidacy around an intensely populist message, arguing Washington has failed working Americans while prioritizing foreign conflicts and wealthy interests over domestic concerns. Platner frequently ties that message to his military service and his own experiences navigating the healthcare system after combat injuries.
But the rise of Platner’s campaign has coincided with mounting scrutiny over his past behavior and personal life.
Questions about the Democrat surfaced shortly after he launched his Senate bid, when old Reddit comments containing racist, sexist, and anti-gay remarks resurfaced online. Platner said the posts were written while he was struggling with PTSD after returning from military service. He later altered a tattoo after critics argued it resembled Nazi imagery. The scrutiny intensified in recent weeks.
Platner’s wife, Amy Gertner, confirmed he had exchanged sexually explicit messages with multiple women during their marriage. Soon after, the New York Times published allegations from former partners describing behavior they characterized as abusive and disturbing. One former girlfriend, a Republican operative, alleged Platner forcefully restrained her during an argument and disputed his claims that he did not understand the symbolism associated with a controversial tattoo.
Platner has denied the allegations and dismissed the reports as politically motivated attacks intended to weaken his campaign.
Speaking to supporters at a rally in Bar Harbor on Friday, Platner directly referenced the controversy surrounding his candidacy and argued voters would reject the attacks against him.
“When politically motivated, serious and false accusations are made against me, Maine, you have my back,” Platner said. “The state of Maine raised me and the state of Maine saved me.”
Collins has already begun signaling she intends to make Platner’s controversies central to the general election campaign.
“The allegations against Graham Platner are extremely troubling and serious, and he owes the people of Maine a detailed answer and I haven’t heard that,” Collins said on Tuesday, speaking to reporters.
PLATNER VOWS NTO TO BE ‘A**HOLE’ LIKE FETTERMAN IF ELECTED TO SENATE
The coming race is expected to draw massive outside spending and national attention as Democrats attempt to defeat one of the last remaining Republican senators with crossover appeal in a blue-leaning state.
The contest could ultimately serve as a defining test of whether the cross-party coalition that kept Collins in office for nearly 30 years can still hold together in today’s deeply polarized political climate. For Democrats, the race offers a major pickup opportunity and a chance to capitalize on enthusiasm surrounding Platner’s outsider campaign, but it also carries significant risks as they weigh whether the controversies surrounding their candidate could drive away the moderate and independent voters needed to defeat Collins in November.