(CN) - Here's what's at stake for presidential candidates on Super Tuesday, the rules by which delegates will be appointed in each state, and how the races stand so far.
A Democratic candidate needs 2,383 delegates to win the nomination.
A Republican candidate needs 1,237 delegates.
Republicans have 595 delegates at stake on Super Tuesday: 24 percent of the 2,472 total delegates.
Democrats have 1,004 delegates at stake, plus 130 superdelegates: 21 percent of 4,763 delegates.
Here are the unofficial standings so far. The Democratic tallies include superdelegates.
Clinton 543
Sanders 85
Trump 81
Rubio 17
Cruz 17
Superdelegates can vote however they like at the convention, but will be expected to follow party orders. This will favor Clinton.
Here are the number of delegates at stake in each state.
Democrats (Delegates at stake-Pledged-Unpledged)
Alabama* 60 - 53 - 7
Arkansas* 37 - 32 -5
Colorado 79 - 66 -13
Georgia* 116 - 102 - 15
Mass. 116 - 91 - 25
Minnesota* 93 - 77 - 16
Oklahoma 42 - 38 4
Tennessee* 76 - 67 - 9
Texas 252 - 222 - 30
Vermont* 26 - 16 - 10
Virginia* 110 - 95 - 14
D-abroad* 17 - 13 - 4
An asterisk means the primary is open - voters can cross party lines.
American Samoa, Colorado and Democrats abroad are caucuses.
Republicans (Delegates at stake-Rules)
Under "winner-take-most" (WTM) rules, a candidate who gets 50 percent + 1 of the votes in a congressional district gets most or all of its delegates. Failing that, delegates are awarded proportionally among candidates who get at least 15 percent or 20 percent of votes in the district.
Alabama* 50 WTM - 50-20
Alaska 28 Proportional - 13 percent needed
Arkansas* 40 WTM - 50-15
Georgia 76 WTM - 50-20
Mass. 42 Proportional - 5 percent needed
Minnesota* 38 Proportional - 10 percent
Oklahoma 43 WTM - 50-15
Tennessee* 58 WTM - 66-20
Texas* 155 WTM - 50-20
Vermont* 16 WTM - 50-20
Virginia* 49 Purely proportional
Wyoming 29 Precinct caucus
An asterisk means the primary is open - voters can cross party lines.
Colorado's caucus is nonbinding, meaning Republican delegates can vote as they like at the convention.
Wyoming Republicans will hold precinct caucuses on Super Tuesday, but the state's long nominating process will not end until the party caucus in April.
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