If dies/disqualified before the Electoral College counts then the following possible: Electors can vote for whomever they want to so could still vote for Clinton, Kaine, Biden, Sanders, or the cute dog that walks on it fore legs.
Electoral College voting were changed by 12th Amendment, adopted in 1804, so that each elector would vote twice—once for President and once for Vice-President.
For more info: http://fas.org/sgp/crs/misc/RS22992.pdf where the following came from:
Succession Between the Popular Election and the Meeting of the
The first period in which succession procedures would be invoked in the event a President-elect or Vice President-elect were to die or leave the ticket for any reason includes the time between the election and the date on which the electors meet in December to cast their votes. Most commentators suggest that in this case the political parties would follow their long-established rules, by which their national committees designate a substitute nominee. In the event of the presidential nominee’s death, it might be assumed that the vice presidential nominee would be chosen, but neither of the major parties requires this in its rules. Further, it is assumed that the electors, who are are dominantly party loyalists, would abide by the national party’s decisions. Given the unprecedented nature of such a situation, however, confusion, controversy, and a breakdown of party discipline among the members of the electoral college might also arise, leading to fragmentation of the electoral vote. For instance, an individual elector or group of electors might justifiably argue that they were nominated and elected to vote for a particular candidate, that the death or withdrawal of that candidate released them from any prior obligation, and that they were henceforth free agents, able to vote for any candidate they chose.