In War and Peace, old General Kutuzov knows that battles are won by the side whose soldiers want to win the most.1
That's what's happening in the Democratic presidential run. Barack Obama's team is lean, efficient, and on its toes in every way that Hillary's is not. In state after state, his campaign has out-organized Clinton's.
Kutuzov, though, didn't have a retired general screwing with his battle plans. Hillary did.
1A goofy idea in general, but in this case it fits.