What if a Party's Nominee Dies Before Election Day?

[Nym90]

Assuming the party had time to announce a replacement candidate before Election Day, it wouldn't be a major problem logistically, other than simply getting the word out to voters that a vote for deceased candidate x=a vote for replacement candidate y. The electors would then cast their vote for the replacement candidate instead of the candidate that they were pledged to. The VP nominee would almost certainly be picked by the party as the replacement candidate, and they would announce a VP choice.

If the death occurred after Election Day but before the EC voted, it would depend a lot on whether the candidate in question had won or lost. Much of the chaos of 1872 was caused by Greeley having lost, thus it didn't much matter who his electors voted for; they were free to vote their conscience. If the winning candidate died before the EC voted, the VP candidate would almost certainly be elected President, and would announce a new choice for VP whom the electors would also vote for.

The electors are the most loyal party members around....they would absolutely not risk splitting their votes if doing so meant throwing the election into the House.