Susan Collins, Troy Jackson Clash

Republican Sen. Susan CollinsSusan CollinsUnited States Senator from Maine since 1997 and Democratic challenger Troy JacksonTroy Dale JacksonAmerican politician met in Bangor for their fourth and final debate, as Collins sought a sixth term. The competitive Maine race could help determine Senate control, with Collins defending a seat in a state that leans Democratic in presidential elections. Trump’s role drove the sharpest split: Jackson said Collins backs him when he needs her, while Collins said she breaks with her party and works across the aisle. They also fought over seniority, costs, health care, immigration, energy and trade with Canada. A protester briefly interrupted the live debate before security removed him. The outcome remained uncertain as voters approached the election.