Calling it a night.
Not all the races have been called, and results will keep trickling in into the morning. John Cox's second-place finish in the California governor race may be the most significant development of the night, as it helps boost Republican turnout in November. Rep. Martha Roby's runoff is also particularly interesting — her runoff will be a replay of the 2010 general election.
Democrat Antonio Villaraigosa is not likely to keep the polls open until Friday. Republicans could have the first woman governor in South Dakota. Democrats might get the first Native American Congresswoman in New Mexico.
Republicans may get locked out of the California Senate and lieutenant governor races.
I have been updating this article with results, and will finish that up tomorrow morning. Godspeed!