Governor Janet Mills has launched a Senate campaign in Maine, setting up a potentially heated primary in 2026. This move is a win for Democratic leaders, who view current Senator Susan Collins as a top target. Mills, a two-term governor, was encouraged to run by Senate Minority Leader Chuck Schumer. Progressive candidate Graham Platner, endorsed by Bernie Sanders, is also running and gaining traction. Mills' campaign video focuses on her past disputes with former President Trump, highlighting her legal victories against him. She also criticizes Collins' voting record on key issues. The primary race could highlight divisions within the Democratic Party, particularly concerning age, ideology, and experience. Sanders had urged Mills not to run, fearing a divisive primary. Several youth organizations are supporting Platner, sparking discussion about generational change in the party. Other candidates in the Democratic primary include Dan Kleban and Jordan Wood.