I ask a question and get an answer in exactly one second.  New world record!

Seems to be totally up to the governor if he wants to hold an election or not.  If I was gov, I'd let it stay vacant for six months, but that's just me.  Seems silly to waste the taxpayer's money on two elections (the primary and the general) just so somebody can serve for four months, at least one of which Congress is out of session anyways.