> but could it be changed last minute? Ballots are locked for a certain period of days before an election. The presidential candidate chooses their running ma

> but could it be changed last minute? Ballots are locked for a certain period of days before an election. The presidential candidate chooses their running mate and are voted on together. Until the early 1800's, the winning presidential candidate became president and the runner-up became VP. This didn't work out very well because the VP sometimes came from the opposing party. If a sitting VP leaves office prematurely, then Congress votes on the replacement. I assume that would also be the case in a VP-elect situation.