The sudden exit of Janet Mills from the U.S. Senate race in Maine is a flashing warning sign for Democrats.Mills wasn’t just trailing — she was getting blown out. In poll after poll, political newcomer Graham Platner was beating her by double digits, a remarkable showing against a sitting governor. .memberful-global-teaser-content p:last-child{ -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent); mask-image: linear-gradient(180deg, #000 0%, transparent); } Join now to continue reading.Members get exclusive analysis, bonus features and no advertising. Learn more.If you’re already a member, sign in to your account.