Democrats have reclaimed control of both houses of the Nevada Legislature after suffering devastating losses in the 2014 midterm election.
The party won two neck-and-neck southern Nevada Senate contests that helped turn their 10-11 minority last session into an 11-10 majority.
In state races for the US House, incumbents Dina Titus in District 1 and Mark Amodei in District 2 won easily. In District 3 Jacky Rosen was elected to succeed Joe Heck, defeating Danny Tarkanian, and incumbent Crescent Hardy was defeated in District 4 by Ruben Kihuen.
The state assembly will be in Democratic hands in January, and so will the state senate, by an 11-10 margin.
Catherine Cortez Masto also became the first Latina elected to the US Senate, defeating Joe Heck.