After losing 7 of the last 8 contests (including Democrats Abroad), Clinton's got a big problem.
It's not a problem that she's somehow likely to lose the whole thing; it would still take a minor miracle for Bernie Sanders to pull off the come-from-behind victory this late in the primary season.
The problem is all about damage control, unity, and general election prospects of going home the winner.
She has to campaign to win, but also do it in a manner that doesn't embitter the entire following of Sanders.