To beat Collins in Nov, the Democratic nominee will likely need to win only ~80% of voters who disapprove of Trump. Every D Senate candidate in 18/20 won at least 89% of them-except Gideon, who carried just 71% v Collins. Pre latest scandals, Platner was winning just 74% of them.
Dems can't force out Platner if he wins today, as is near certain. But if he steps aside by 7/13 they can replace him. And in today's governor primary there are 3 alternatives w/broad support on the left: Jackson, Pingree, Bellows. At least 2 soon will be available to replace him