The couple will appear on two separate days in late February for a deposition after coming to an agreement with the House oversight committee.

The 53-year-old, who was once widely seen as the second most powerful person in Libya, was killed on Tuesday according to Libyan media.

Prime Minister Pedro Sánchez says the move will protect children from the "digital Wild West".

American elections are primarily run by state law, and voting is administered by local officials across the country.