This means he can be replaced with another Democrat
Graham Platner can be replaced as the Democratic nominee for Senate in Maine if he withdraws from the race by next Monday, and state law would then give the state Democratic Party until July 27 to name a replacement.
He’s dragging it out, too. Like a toddler throwing a tantrum. I hope he actually files the paperwork on Monday, but at this rate I’m not holding my breath.
Source
From what I’ve heard he’s trying to force the DNC to replace him with a progressive candidate and not an institutionalized boot licker?