OGUNQUIT, Maine — Within days of the New York Times trawling through Maine Senate hopeful Graham Platner’s volatile past relationships, the campaign’s latest flyer, prominently displaying a supporter waving a “Women for Graham” sign, arrived in voters’ mailboxes.

Platner had been coasting to a win in Tuesday’s primary, with his opponent for the Democratic nomination, Maine Gov. Janet Mills (D) seemingly having thrown in the towel.