2026 Democratic nominee for US Senate in Maine?

Question

Susan Collins (R-ME) is up for reelection in 2026. Which Democrat will face her?

(Feel free to suggest additions, though I'll only add people who I subjectively think have a >2% chance of winning.)

Manifold Markets · Answer

Per Manifold Markets prediction market, Graham Platner, followed by Janet Mills and Other are most likely. See the market for live updates (112 traders, as of Jun 2, 2026).