Democrats hold a slim majority with 51 seats, including four independents who caucus with them, while Republicans hold 49 seats.
This year’s election is set to shape the legislative landscape for years to come, with both parties fighting for every possible seat.
Below are the latest results and the real-time forecast for each race.
Follow our live US election coverage:
- US presidential election live results
- Live results from key swing states
- US House of Representatives: live results