If Senator John McCain should die while in office or resign, Governor Doug Ducey would appoint his replacement. State law dictates that McCain's replacement must be a Republican and would serve at least until the following general election in 2020.
Ducey has previously said he would not appoint himself, but just who he would tap to fill the role of the six-term Senator remains to be seen.
This would be the first time in Arizona history that a Senate seat would be filled through a Governor's appointment.