With Shaheen, I think she'll lose Rockingham.
Agreed. Since I think Shaheen's victory will be by about the same amount as Hassan's 2012 victory (in which Hassan won every county), it wouldn't be impossible for Shaheen to do the same, but Hassan is from Rockingham County and Brown is "from" Rockingham County as well as a better fit for that area (wealthy, fiscally conservative) than her 2012 opponent, Lamontagne (a so-con). In 2008 Shaheen lost Rockingham, Belknap, and Carroll, when she won 51-45 statewide. She almost certainly won't lose Carroll, though it's possible she also loses Belknap (which was 51.85% Romney, as opposed to Rockingham which was 51.59% Romney). The rest of the counties are safe Shaheen.