No clue why everyone thought this was safe D for most of the election cycle.
D+18 is a damn good reason. This is really surprising.
Is it really though? Djou held Hanabusa to a 9 point win in 2012 even as Obama was romping with 70%+ in the state. Now there's no incumbent, it's lower turnout, more Republican friendly year, no Obama coattails, and Djou is running again. That seems like a rather obvious recipe for a very close race to me, PVI notwithstanding.
If it's D+18, a non-redistricted non-incumbent Republican should have about a 0.00% chance of winning it. The most partisan D district held by a Republican right now is CA-31, which is D+5.
No Democrats even hold a R+18 or higher seat.
Hard to believe this is a reliable poll.