What would happen if the Democrat (or Rep.) candidate would be killed (or died) after the final nomination but before the November election. Would the runner up be the new candidate or the person nominated as vice president by the now dead candidate?
The party represented by the candidate would probably choose a new candidate -- most liekly the chosen candidate's VP, or the closest competitor from the primary race. But not necessarily. Dead people cannot be elected, and if elected, may not serve. ;>)