The only way I see Aiona beating Ige is if Abercrombie supporters vote for Hannemann and split the D vote
Flip Ige and Abercrombie and I see you being correct. Remeber that Hannemann was Abercrombie's primary opponent for Governor in 2010, and some of those voters would probably stick with Hannemann due to Abercrombie's governorship. Ige would bring more of those people back.
I guess it works both ways, but Aiona has an advantage against Abercrombie in that he is an incredibly unpopular governor while Ige is simply a generic D which is why im surprised he trails Aiona