How would a Senate seat have opened up if Clinton won? Was HRC going to appoint Hirono or Schatz to a cabinet post or ambassadorship? And realistically, how far  will she get as a presidential candidate? Vice President may be possible if the ticket needs a WOC military veteran, but isn't Senator Duckworth already better at filling that need, and from a more populous state? If she challenges Hirono in a primary, she will end up like Ed Case, and for the same reason: she has to wait her turn.