What happens if a political nominee for President of the USA dies between the convention and the election?
On the local level, candidates die, become disabled, resign, etc. all the time. Each state has a deadline for removing a name from a ballot. If the candidate becomes unable to serve before the deadline, then a new candidate named by the national party’s executive committee could be placed on the ballot–in those states in which the deadline has not passed. But what happens if the candidate dies on November 3rd and the election is held the next day? Well, the dead guy might win. But, ultimately since the presidential election is not a direct election, rather an election of electors, if the party of the dead candidate got the most votes their slates of electors would select the new president. There really isn’t much constitutional guidance here. The Electors shall meet in their respective States, and vote by Ballot for two persons, of whom one at least shall not lie an Inhabitant of the same State with themselves. And they shall make a List of all the Persons voted for, and of the Number
