Super Tuesday is the biggest day of the Democratic primary campaign. Fourteen states will hold nominating contests to pick who they think should square off this fall against President Trump.
There are 1,357 delegates at stake, about a third of all delegates. So far, fewer than 4% of the delegates have been allocated.
People will head to the polls all across the country, from Virginia to California, Tennessee to Texas. The states and voters are diverse. Almost half have significant black populations, and Latinos figure to be an important factor in the two states with the biggest delegate hauls, California and Texas.