A Democratic senator wanted to ban super PACs in primaries. Now he’s benefiting from one

Sen. Ed Markey (D-MA) lobbied Democrats to ban super PACs from meddling in their primaries. Now, despite his crusade, he’s being bolstered by one in a messy primary against Rep. Seth Moulton (D-MA). Candidates are prohibited under federal election laws from coordinating with or receiving money from super PACs. Still, Markey has so far declined…