“The fate of the Senate majority could lie in the hands of 601 yet-to-be-chosen Maine Democrats. And Chuck Schumer, known for working every possible angle to give his party’s campaigns an edge, is largely helpless to do anything about it,” Politico reports.”The sidelines are an unusual place for the longtime Senate Democratic leader. Known for his heavy-handed interventions during his successful tenure leading the party’s campaign arm, his well-documented recruiting in key battleground races this year and penchant for near-constant backchanneling via his signature flip phone, Schumer is well aware he is now facing a new political reality.”USA Today: The Maine Senate race is key to a Democratic takeover in midterms.