Closed Primaries Present New Hurdle for Sanders

Dan Balz: “No day on this year’s primary-caucus calendar sets up any better for Sanders than this year’s Super Tuesday. Beyond that, primaries in the future are mostly closed, denying Sanders the votes of independents, one of his best constituencies.”

“Campaign strategists can’t say just how well Sanders will be positioned after Super Tuesday. There are simply too many variables — too many candidates, too much fluidity and too many combinations about possible outcomes. Campaigns have been modeling the states and constantly tweaking internal projections. As one strategist put it: ‘It’s an insane Rubik’s cube.’”