Maine Democratic Senate candidate Graham Platner is leading Sen. Susan Collins (R-Maine) in the race for her seat by 7 points, according to a new poll. In the Pan Atlantic Research poll, 48 percent of likely voters said they back Platner in a hypothetical matchup, while 41 percent said they support Collins. Eleven percent were undecided. When broken down by gender, 53 percent of women respondents backed Platner and 34 percent supported Collins. Men surveyed, meanwhile, said they support Collins over Platner, with 47 percent backing the incumbent and 44 percent supporting her potential challenger. The Democratic Party establishment was...