The only silver lining for Clinton supporters with Washington today is that the Caucus allows for absentee ballots, and apparently there's been a record number turned in already. If anyone remembers Nebraska, Hillary was able to keep Sanders margin down somewhat due to all the absentee votes she got.
I'll bet Clinton pushed that early vote/absentee voting to the max like she did in other states. It won her Ohio and Arizona decisively and as you said, kept Sanders at 57% in Nebraska when Kansas went 68% for him