Rick Klein: “Hillary Clinton’s decision to not engage – and not even take a firm position – is itself a policy stance that has frustrated liberals along the way. But they don’t seem to have penetrated the debate in a way that’s made the Clinton campaign reconsider. The fact that a debate that’s torn Democrats apart to the point that they’re threatening to let each other “rot” has played out without the participation of the overwhelming frontrunner for president is nothing short of remarkable.”

