One usually surefire way to gauge the political climate on election night is to follow the clock of poll closings across the nation, east to west.
But this is no normal midterm. Several races are expected to be razor-close to the very end, and some are all but certainly headed to runoffs or recounts.
"Election night might be more about looking for clues than getting answers," wrote Jennifer Duffy of the nonpartisan Cook Political Report. "Settle in for a long night, and prepare for the battle for the Senate majority to go into overtime."
That said, here's a rough schedule of the evening's events, in Pacific time, with thanks to Cook...