CRS report via FAS – Presidential Elections: Vacancies in Major-Party Candidacies and the Position of President-Elect, Thomas H. Neale, Specialist in American National Government. October 6, 2016.

“What would happen in 2016 if a candidate for President or Vice President were to die or leave the ticket any time between the national party conventions and the November 8 election day? What would happen if this occurred during presidential transition, either between election day and the December 19, 2016, meeting of the electoral college; or between December 19 and the inauguration of the President and Vice President on January 20, 2017? Procedures to fill these vacancies differ depending on when they occur.”