Republican U.S. Rep. Bruce Poliquin is widening a lead over Democratic challenger Emily Cain in the race to represent Maine’s 2nd District, according to a new poll by the Portland Press Herald/Maine Sunday Telegram. Poliquin is now leading Cain by 10 percentage points among likely voters in the 2nd District, although the number of undecided voters has also increased slightly since June, according to the poll, which was conducted in September by the University of New Hampshire Survey Center.