[CurlyDave]

They become worthless. You vote for a person, not a party. That is the risk you take with early voting.

Not true. You vote for a slate of electors in the electoral college. The electors are pledged to a particular candidate.

If Biden runs out of steam before the election they try to substitute someone else. Although there will be court battles over "faithless electors" and requirements to be on the ballot.

It will be as exciting as it gets. Trump's odds improve with every new development.

[ElkGroveDan]

Not true. You vote for a slate of electors in the electoral college.

No. You vote for a candidate. The candidate appoints the electors.

[DownInFlames]

The lector’s vote for the WINNER of each state. The candidate winning 270 electoral vote wins.