A reader offers another view of what happened in New Hampshire:
My thoughts as to why Hillary’s been doing well is simpler than yours. I think a lot of NH Dems waited until the last debate to make up their minds, and for Democrats, at least, she came through that night: her rationale as to why she should be the candidate of the party, I thought, was very effective.
Certainly in the minds of Democrats like me, she became a viable candidate again, despite the fact that if I was a NH resident, I probably would have voted for Obama.