Maine Democrats vying to replace Graham Platner as their party’s nominee to face off against Republican Senator Susan Collins are set to debate on Thursday ahead of the nominating convention to select a new candidate.The Maine Senate race, one of the most competitive of the 2026 midterm elections, was upended after Democratic nominee Platner withdrew from the race earlier in July as he faced allegations of sexual assault. Platner denied the allegations but ended his campaign, opening up the primary for a new candidate.State law allows the party to select a new nominee, and that process is now underway, with...