Yes — based on the reporting, if Graham Platner drops out after the replacement deadline, Janet Mills would be the one most likely to stay on the November 2026 ballot, since she has already said she’s still on it after suspending her campaign.

What the reports say

The key detail is timing: one report says Maine law allows Platner to be replaced if he withdraws before July 13, which would preserve a path for Democrats to swap in another nominee. Another report says Mills “remains on the ballot” even after suspending her campaign, and a later clip says she thanked Mills after winning the primary.

Practical read

So the answer is:

  • If Platner drops out before the legal cutoff, Democrats could potentially replace him.
  • If he drops out after that cutoff, the party’s replacement options get much narrower.
  • Mills herself appears to still be on the ballot, so a Platner exit would not automatically remove her.

What’s still uncertain

The exact ballot status can depend on Maine election deadlines and what party officials formally file. But from the reporting available, the safest reading is that yes, Janet Mills can still be on the November 2026 ballot if Platner exits , and she was being treated as still on the ballot even after suspending her own campaign.

TL;DR

Platner dropping out would not, by itself, knock Mills off the ballot; the bigger issue is whether he quits before Maine’s replacement deadline.