Democratic Party candidates have a strong chance of beating Maine 's Republican Senator Susan Collins in the upcoming midterm election, according to a new poll. According to polling by Zenith Research for More Perfect Union, Democratic candidates Graham Platner and Governor Janet Mills are both ahead of Collins as she vies for her sixth term in office. Newsweek reached out to Collins, Platner and Mills to comment on this story outside of normal business hours. Maine's Senate race is likely to