AXIOS (Avery Lotz) - Troy Jackson picked to challenge Collins in Maine after Platner's exit
Democrats selected former Maine Senate President Troy Jackson on Saturday to challenge Republican Sen. Susan Collins this fall after Graham Platner's embattled campaign ended. Why it matters: Jackson's selection is another win for the left flank of the Democratic party, which lined 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: Delegates to a special nominating convention selected Jackson Saturday morning, the Associated Press reported . - Jackson all but locked up the nomination last weekend after Democrats across the state overwhelmingly selected his preferred delegate slate. - "We're well on our way to getting the government…