A voter takes part in the Democratic primary in Purcellville, Virginia. Photo: Andrew Caballero-Reynolds/AFP via Getty Images
Voters in 14 states and one territory cast their ballots on Super Tuesday, tweeting and blogging along the way.
Why it matters: The huge delegate hauls of California and Texas this year make the day about as close as the U.S. gets to a national presidential primary.
The big picture: Analysts are watching tonight to see if Joe Biden can turn a South Carolina landslide — and the subsequent unification of moderate Democrats — into a campaign that can beat Bernie Sanders.
As Dave Wasserman, editor of the Cook Political Report, tweeted today, that's hard to guess:
Reporters have fanned out across the country to describe the mood of voters casting their ballots and the challenges election workers face as voters exercise the most basic democratic right.
Go deeper ... Super Tuesday: What you need to know