Democrats ran a middle aged, centrist, milquetoast white woman in Sara Gideon against Susan Collins in 2020. Not only did she lose, she lost by nearly 8% points. She lost at a time when Biden won the state and she underperformed Biden. She lost when everyone was predicting she would win. She lost when polling predicted she would win. Graham Platner is problematic in a lot of ways. The Nazi tattoo and the reddit comments about rape are indeed a problem. They will be used as attacks by the Republicans on him. But it isn't like running a middle aged, milquetoast, centrist, white woman worked last time. Sara Gideon lost. She's not the Senator. So I don't know that running a 70+ year old centrist, milquetoast white woman would work either. The polling certainly seems to indicate it won't.