As we all know, John McCain is swiftly approaching 72 years old and has a history of health problems. Here's the question: suppose he (or any other candidate for that matter) were to assume room temperature during the campaign before November, but after the party's nominating convention - how would his replacement be determined? Just to complicate matters, let's assume said candidate selected a real turkey as his running mate that would not be a suitable replacement. My initial thought was that the party's delegates would have to reconvene and select another nominee. However, consider the disadvantage the new nominee would be working under. Months/years of fundraising and campaigning would be needed to catch up with the opponent. What about the extensive primary and caucus process - would the election have to be delayed? I'm sure the respective political parties have provisions for this scenario, but are they practical given the enormous amount of time and money that goes into presidential elections? Just some food for thought.