Senator Ruben Gallego endorses Platner, marking a second Senate endorsement and signaling growing establishment progressive support despite Schumer backing Mills

Graham Platner rises to 95%2%

Senator Ruben Gallego endorses Platner, marking a second Senate endorsement and signaling growing establishment progressive support despite Schumer backing Mills

Senator Elizabeth Warren endorses Platner at a rally in Portland, Maine, praising him as a fighter who can beat incumbent Susan Collins;

Graham Platner jumps to 93%13%

this high-profile endorsement boosts his credibility and support

Platner announces plans to investigate Trump and impeach two Supreme Court justices if elected, signaling a strong progressive stance;

Graham Platner jumps to 80%5%

this energizes his base ahead of the primary

Reports indicate Mills’ campaign momentum is fading with limited outside support and ineffective ad spending, as Platner maintains a strong lead heading into the primary

Janet Mills drops to 0%9%

Reports indicate Mills’ campaign momentum is fading with limited outside support and ineffective ad spending, as Platner maintains a strong lead heading into the primary

Mills launches aggressive attack ads targeting Platner’s past controversial Reddit posts and tattoo, but the ads fail to significantly shift voter sentiment or polling in her favor

Janet Mills plunges to 9%15%

Mills launches aggressive attack ads targeting Platner’s past controversial Reddit posts and tattoo, but the ads fail to significantly shift voter sentiment or polling in her favor

Senator Elizabeth Warren endorses Graham Platner over Mills, signaling establishment fractures and boosting Platner’s progressive support, further weakening Mills’ position

Janet Mills dips to 24%1%

Senator Elizabeth Warren endorses Graham Platner over Mills, signaling establishment fractures and boosting Platner’s progressive support, further weakening Mills’ position

Mills launches first negative ad highlighting Platner's past sexist comments;

Graham Platner jumps to 75%9%

Platner responds with apologies and continues to hold a commanding lead in polls, showing voter forgiveness or acceptance

Jordan Wood submits qualifying signatures for Maine's 2nd Congressional District primary, confirming his shift away from the Senate race

Jordan Wood dips to 0%1%

Jordan Wood submits qualifying signatures for Maine's 2nd Congressional District primary, confirming his shift away from the Senate race

Analysis highlights Maine Senate race as highly competitive with strong candidates Janet Mills and Graham Platner leading the Democratic primary field, diminishing Wood's prospects

Analysis highlights Maine Senate race as highly competitive with strong candidates Janet Mills and Graham Platner leading the Democratic primary field, diminishing Wood's prospects

Platner faces backlash for promoting an antisemitic conspiracy theorist but quickly removes the post;

Graham Platner jumps to 74%8%

his campaign remains resilient amid scrutiny, and he resumes active campaigning with town halls

Age concerns resurface in media coverage, with Mills defending her fitness and contrasting herself with Joe Biden, while Platner’s youth and populist appeal gain traction among

Janet Mills drops to 22%12%

Age concerns resurface in media coverage, with Mills defending her fitness and contrasting herself with Joe Biden, while Platner’s youth and populist appeal gain traction among Democratic voters

Mills issues a statement responding to federal ICE immigration enforcement operations in Maine, showing active leadership but also facing criticism for traveling out of state

Janet Mills dips to 32%1%

Mills issues a statement responding to federal ICE immigration enforcement operations in Maine, showing active leadership but also facing criticism for traveling out of state during the operation, which may have hurt her standing

Mills touts a $190 million federal rural health care grant as a major achievement linked to her administration, attempting to bolster her profile against Platner’s insurgent

Janet Mills jumps to 40%10%

Mills touts a $190 million federal rural health care grant as a major achievement linked to her administration, attempting to bolster her profile against Platner’s insurgent campaign

Democratic Senate hopeful Jordan Wood drops his Senate campaign and enters the race for Golden’s now‑vacant House seat, further confirming Golden’s exit eliminates any chance of

Democratic Senate hopeful Jordan Wood drops his Senate campaign and enters the race for Golden’s now‑vacant House seat, further confirming Golden’s exit eliminates any chance of his winning the primary

Jordan Wood drops out of Maine Senate race to run for the 2nd Congressional District seat after Jared Golden's retirement announcement, citing better resource use in a less

Jordan Wood dips to 0%4%

Jordan Wood drops out of Maine Senate race to run for the 2nd Congressional District seat after Jared Golden's retirement announcement, citing better resource use in a less crowded primary

Golden’s retirement “opens up” the competitive 2nd‑district seat, prompting analysts to say the Democratic primary is now a contest among other candidates, not Golden

Jared Golden drops to 0%10%

Golden’s retirement “opens up” the competitive 2nd‑district seat, prompting analysts to say the Democratic primary is now a contest among other candidates, not Golden

Progressive Change Campaign Committee endorses Platner, releasing a poll showing him leading Mills by 20 points despite controversies, reinforcing his viability as the Democratic

Graham Platner jumps to 64%8%

Progressive Change Campaign Committee endorses Platner, releasing a poll showing him leading Mills by 20 points despite controversies, reinforcing his viability as the Democratic nominee

Jared Golden announces he will not seek re‑election to the U.S.

Jared Golden plunges to 10%40%

House, ending his bid for a fifth term

Despite negative headlines, Platner's grassroots campaign draws huge crowds and maintains strong polling leads;

Graham Platner surges to 56%25%

Democrats remain reluctant to criticize him publicly, reflecting his growing support base

Inflammatory online posts by Platner surface, including controversial Reddit comments and a tattoo resembling Nazi imagery;

Graham Platner jumps to 42%8%

Platner apologizes and covers the tattoo, but polling still shows him leading Mills by a wide margin in a University of New Hampshire survey conducted Oct 16-21

Polls show Graham Platner leading Mills by a large margin despite controversies, with Platner’s grassroots momentum and Mills’ establishment backing creating a competitive dynamic;

Janet Mills plunges to 40%15%

Platner’s scandals do not significantly dent his lead

Dan Kleban, a prominent Maine Democrat, drops out and endorses Mills, consolidating some party support, but Platner and other candidates remain in the race, limiting Mills’

Janet Mills drops to 31%9%

Dan Kleban, a prominent Maine Democrat, drops out and endorses Mills, consolidating some party support, but Platner and other candidates remain in the race, limiting Mills’ advantage

Dan Kleban suspends his Senate campaign and endorses Gov.

Mills, citing timing and the governor’s stronger position, driving his market

Janet Mills officially announces her 2026 U.S.

Janet Mills jumps to 55%13%

Senate campaign, gaining immediate national Democratic support and raising $1 million in 24 hours, boosting her initial market confidence

Maine Governor Janet Mills announces her Senate bid, instantly reshaping the Democratic field and prompting speculation that lesser‑known candidates will drop out

Maine Governor Janet Mills announces her Senate bid, instantly reshaping the Democratic field and prompting speculation that lesser‑known candidates will drop out

Kleban, co‑founder of Maine Beer Company, officially launches a Senate campaign emphasizing an “outsider” message and cost‑of‑living issues

Dan Kleban plunges to 12%38%

Kleban, co‑founder of Maine Beer Company, officially launches a Senate campaign emphasizing an “outsider” message and cost‑of‑living issues

Reports emerge that Janet Mills is considering a 2026 Senate run, with Democratic leaders actively recruiting her to challenge Susan Collins, raising early expectations for her

Janet Mills dips to 47%3%

Reports emerge that Janet Mills is considering a 2026 Senate run, with Democratic leaders actively recruiting her to challenge Susan Collins, raising early expectations for her candidacy

Jordan Wood announces candidacy for Maine U.S.

Senate seat, becoming the first Democrat to enter the race