Democrat Troy Jackson defeats Republican Susan Collins in a major Maine upset, ending her nearly 30-year Senate career. Al Jazeera's Eva McKend reports from Portland. #USMidterms #MidtermElections #USPolitics #Democrats #Republicans #Maine #SusanCollins #TroyJackson #ElectionResults #AlJazeeraEnglish. Democrat Troy Jackson defeated longtime GOP Sen. Susan Collins in the Maine Senate race, CBS News projects.