Graham Platner, a scandal-plagued Marine combat veteran, won Maine's Democratic Senate primary Tuesday in a race that's seen as the party's best Senate pickup opportunity in November. Why it matters: Many Democratic strategists and elected officials worry that Platner has too much baggage to defeat Sen. Susan Collins (R-Maine) — and that his candidacy will doom the party's chances of retaking the Senate in the 2026 midterms. Controversies that have swirled around his campaign include a Nazi-li