Say, for example, during the third Presidential debate in 2004 at Washington University in St. Louis, the New Madrid fault line goes off and a massive earthquake strikes Missouri, destroying the building where the debate was held. Bush, Cheney, Kerry and Edwards are all instantly killed.
How would the parties choose replacement nominees for President and Vice-President?
The Natn'l Committe would decide--probably the VP cand., but not necessarily. Did you get your scenario from It Could Happen Tomorrow on the Weather Channel, b/c that was just on?