BREAKING: Democrats have now flipped 6 seats in the US Senate, officially gaining control of both the US House and Senate.
This marks the largest Democratic gain in the US Senate since 2008, when the party achieved a net gain of 8 seats.
Kansas' US Senate seat has flipped Democrat for the first time since 1932, ending a 94-year Republican winning streak in the state.
Democrats have also flipped 15 seats in the US House.