Platner is the latest Democrat to announce his candidacy in the 2026 senate race against the incumbent Collins. Others include Jordan Woods, the former chief of staff to then-Rep. Katie Porter, and David Costello, who ran against Maine Independent Sen. Angus King in 2024.

G raham Platner, a military veteran and oysterman from a small town near Maine's Acadia National Park, will run for U.S. Senate as a Democrat, he announced on Tuesday, in an effort to oust Republican Susan Collins, the five-term senator who is expected to run for reelection next year.