A state-by-state overview of Super Tuesday, where 15 contests are up for grabs

To put things into perspective, there were 155 promised delegates available in the first four contests of the race, which were the obsession of candidates, voters, experts and political tipsters for the month of February. On Super Tuesday, 1,344 delegates are to be taken – as well as 13 delegates representing Americans abroad, who have one week to vote from Tuesday.

If a candidate can obtain 1,991 or more of the 3,979 delegates available in all the primary competitions before the National Democratic Convention of July 13, the nomination is theirs.

The last:Super Tuesday primary election results live from 14 state primaries

These numbers help explain why billionaire media mogul Mike Bloomberg decided to ignore Iowa, New Hampshire, Nevada and South Carolina to focus his half-billion-dollar ad blitz on the states of the 3rd of March. He marked his first campaign season delegates in American Samoa, according to projections.

Going into the night, Sanders led the delegate count after the first four contests, but Biden closed in less than eight with his decisive victory in South Carolina on Saturday. Will Sanders put the nomination out of reach after Tuesday’s vote, or will Biden have enough momentum outside of Palmetto State to keep the race competitive? What effect will Pete Buttigieg, Amy Klobuchar and Tom Steyer lose on the race? How will Bloomberg’s unorthodox approach pay off?

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Alabama – Biden wins

Delegates to win: 52

Closing of surveys: 8 p.m. est

What to watch: Alabama race polls have been rare, so it’s unclear how the main race is preparing. The latest survey, which was conducted in July, found that Biden had a lead of almost 20 percentage points. The race has changed dramatically in the past seven months.

As soon as the polling stations closed, the Associated Press projected that it had won the state.

Biden will be helped by his approval of the Alabama Democratic Conference – an influential African-American political league. One of the biggest questions will be how many voters in the state are attracted to Bloomberg after its advertising bombing.

On the Republican side, former Attorney General Jeff Sessions is fighting to regain his Senate seat in a battle with former college football coach Tommy Tuberville, representative Bradley Byrne and former judge Roy Moore. If none of them obtains a majority, there will be a second round between the two best finalists on March 31. Whoever encloses the nomination will face outgoing Democratic Senator Doug Jones, who will face a fierce battle for re-election to the deeply red state.