Super Tuesday is by far the biggest day in the Democratic presidential primary process. Follow along for live results here.

Here’s what happened so far:

Here’s the current delegate count, including the early results from Super Tuesday states:

Here’s what next:

California and its huge chunk of delegates pose a crucial opportunity for Sanders as Biden crushes him almost everywhere else in the country, including in states like Minnesota and Massachusetts where Sanders was largely favored to win.

We’re also monitoring important down-ballot US Senate and House races in North Carolina, Alabama, Texas, and California.

Biden has officially overtaken Sanders in the delegate race – Stay tuned for more delegate updates.

Pre-primary coverage:

All about Super Tuesday:

What’s at stake on Super Tuesday?

Every state has a certain number of delegates to allocate, determined by factors including how big the state is, how Democratic it leans, when it votes, and whether it votes with its neighbors.

On Tuesday, 1,357 pledged delegates, accounting for 35% of all the delegates allotted throughout the Democratic nomination process, will be allocated from 14 states and one US territory, and from Democrats living abroad:

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Vermont allocates 16 pledged delegates to the convention, or 0.4% of the total.

allocates 16 pledged delegates to the convention, or 0.4% of the total. Virginia allocates 99 pledged delegates to the convention, or 2.3% of the total.

allocates 99 pledged delegates to the convention, or 2.3% of the total. North Carolina allocates 110 pledged delegates to the convention, or 2.8% of the total.

allocates 110 pledged delegates to the convention, or 2.8% of the total. Alabama allocates 52 pledged delegates to the convention, making up 1.4% of the total delegates allocated throughout the primary.

allocates 52 pledged delegates to the convention, making up 1.4% of the total delegates allocated throughout the primary. Maine allocates 24 pledged delegates to the convention, or 0.6% of the total.

allocates 24 pledged delegates to the convention, or 0.6% of the total. Massachusetts allocates 91 pledged delegates to the convention, making up 2.3% of the total.

allocates 91 pledged delegates to the convention, making up 2.3% of the total. Oklahoma allocates 37 pledged delegates to the convention, making up 0.9% of the total.

allocates 37 pledged delegates to the convention, making up 0.9% of the total. Tennessee allocates 64 pledged delegates to the convention, or 1.6% of the total.

allocates 64 pledged delegates to the convention, or 1.6% of the total. Texas allocates 228 pledged delegates to the convention, accounting for 5.7% of the total.

allocates 228 pledged delegates to the convention, accounting for 5.7% of the total. Arkansas allocates 34 pledged delegates to the convention, making up 0.8% of the total.

allocates 34 pledged delegates to the convention, making up 0.8% of the total. Colorado allocates 67 pledged delegates to the convention, making up 1.7% of the total.

allocates 67 pledged delegates to the convention, making up 1.7% of the total. Minnesota allocates 75 pledged delegates to the convention, accounting for 1.9% of the total.

allocates 75 pledged delegates to the convention, accounting for 1.9% of the total. Utah allocates 29 pledged delegates to the convention, making up 0.7% of the total.

allocates 29 pledged delegates to the convention, making up 0.7% of the total. California allocates 415 pledged delegates to the convention, making up 10.7% of the total. Polls closed at 8 p.m. PT (11 p.m. ET), but final results may be delayed for days as officials count mail-in and absentee ballots.

allocates 415 pledged delegates to the convention, making up 10.7% of the total. Polls closed at 8 p.m. PT (11 p.m. ET), but final results may be delayed for days as officials count mail-in and absentee ballots. American Samoa allocates six pledged delegates to the convention. Because American Samoa is six hours behind ET, we won’t have results until Wednesday afternoon.

allocates six pledged delegates to the convention. Because American Samoa is six hours behind ET, we won’t have results until Wednesday afternoon. Democrats abroad vote absentee March 3-10 and account for 13 pledged delegates to the convention, making up 0.3% of total delegates.

Democrats allocate most of their pledged delegates proportionally by legislative district, in addition to allocating at-large and PLEO (party leader and elected official) delegates based on the statewide vote breakdown.

Most states allocate their delegates by congressional districts, but some, like Texas and New Jersey, use state legislative districts instead.

While delegates are allocated proportionally, in nearly every state the minimum threshold to earn delegates is 15% of the vote. This means candidates must break 15% of the vote at either the district or state level to earn any delegates.

At the convention, a candidate will be nominated when they earn a simple majority of 1,991 out of 3,979 total pledged delegates.

Who did the polling say was ahead in each state?

According to FiveThirtyEight’s averages of the latest polling data, Sen. Bernie Sanders led the polls in California, Colorado, Maine, Massachusetts, Minnesota, Texas, Utah, Virginia, and his home state of Vermont.

Sanders was neck-and-neck with former Vice President Joe Biden in North Carolina polls, while Biden and former Mayor Mike Bloomberg of New York City led the few recent polls of Oklahoma.

According to FiveThirtyEight’s primary election forecast, Biden was projected to win the most delegates in Alabama, American Samoa, Arkansas, North Carolina, Oklahoma, Tennessee, Texas, and Virginia.

Sanders was projected to win the most delegates in California, Colorado, Massachusetts, Minnesota, Maine, Utah, and Vermont, while neither Bloomberg nor Sen. Elizabeth Warren of Massachusetts was projected to win the most delegates in any state.