Troy Jackson poised to seize Maine baton after Platner's exit

Democrats are rallying around former Maine Senate President Troy Jackson (D) in the quest to unseat Republican Sen. Susan Collins this fall after Graham Platner's embattled campaign crashed, burned and ended. Why it matters: Jackson's expected coronation is another win for the left flank of the Democratic party, which is lining up behind another progressive candidate as their best shot at flipping one of the most important seats to win back Senate control. Driving the news: Jackson all but…