From Wikipedia: Faithless electors in the 2016 United States presidential election.
From Congress.Gov: H.R.3295 - Help America Vote Act of 2002.
From Wikipedia: Election Assistance Commission.
From USA.Gov: Historical Election Results.
From the National Conference on State Legislatures: State Election Laws an Procedures.
From Ballotpedia: Important dates in the 2020 presidential race.
From Ballotpedia: Important dates in the 2020 presidential race.