Speaking to supporters in the small town where he was born, Platner, an oyster farmer and combat veteran, stressed a message of redemption as he promised to oust Collins.
Platner's expected win in the primary came after days of questions about his past personal conduct, particularly his relationships with women, that threatened to undermine enthusiasm on the left over his candidacy.
Platner, a leftist who had early support from socialist Sen. Bernie Sanders, has said he plans to focus on economic issues such as housing and healthcare.
First elected in 1996, Senator Collins has said her experience and key position as chair of the powerful appropriations committee are two reasons to send her back to the Senate.
“While others talk about revolution and division, Susan Collins is delivering for Maine communities by funding rural hospitals, supporting our shipbuilders and fishermen, improving infrastructure, expanding broadband, and strengthening public safety,” said Collins’ spokesperson, Shawn Roderick. "Maine people are practical. They care about whether their communities are stronger and their families are better off. That’s exactly what Susan Collins is focused on every single day.”
