elector / Electoral College
elector / Colegio Electoral
an elector is one of the 538 people who formally choose the President; together they form the Electoral College.
Example
A candidate needs at least 270 of the 538 electoral votes to win the presidency.
In Spanish
elector / Colegio Electoral — un elector es una de las 538 personas que eligen formalmente al presidente; juntas forman el Colegio Electoral.
Un candidato necesita por lo menos 270 de los 538 votos electorales para ganar la presidencia.