The Democrats will retain majority control of the US Senate after winning a pivotal race in the state of Nevada.
Senator Catherine Cortez Masto is projected to defeat Republican challenger Adam Laxalt, who was backed by former President Donald Trump.
A BBC report states that the results amount to the best midterm performance for a sitting party in 20 years.
US President Joe Biden said he was incredibly pleased, and it was time for Republicans to decide “who they are”.
The Democrats will now have 50 Senate seats, with Republicans currently on 49.