It is not an nomination; the voters have no say in the matter, it is an appointment. And McCain (who has probably been dead for a few weeks) and his family and minions have set things up so that there will be no special election.
If that’s true, that McCain’s death has already occured and has been hidden from the public, I expect either Megyn or her husband to spill the beans one day. Megyn is a bundle of emotions most the time, and her husband likes getting attention. Although he’s not quite as obvious as is KellyAnne’s husband.