Biden had been lagging behind Sanders and the other candidates until the South Carolina primary, which Biden won going away on the Saturday before Super Tuesday. In between, one of the more high-profile candidates, former South Bend, Ind., mayor Pete Buttigieg, had ended his campaign and endorsed Biden. Buttigieg had barely finished first in the Iowa caucuses, the first event on the political calendar this year. Minnesota Sen. Amy Klobuchar, who finished consistently far behind in the first handful of contests, also ended her candidacy and also endorsed Biden.

Another high-profile candidate, former New York mayor Michael Bloomberg, had not gotten his name on the ballot in the early states but had spent $500 million on advertising all across the country in the past few months. He was banking on some big wins on Super Tuesday and finished no higher than third in any state. Not long after results started to come in, he, too, ended his campaign and he, too, endorsed Biden.

The other candidate still in the race, Massachusetts Sen. Elizabeth Warren, has not conceded. She finished third in four states, including her home state.

The caucus and primary season rolls on, with another medium-sized slate of elections scheduled for March 10, including the delegate-rich Michigan, and one more still the following Tuesday, including Florida, Illinois, and Ohio. The last state caucuses and primaries take place on June 2. The Virgin Islands, on June 6, are the last of the American territories to vote.

The Democratic Party nominee needs 1,991 delegates to win the nomination. The total number of pledged delegates is 3,979. On Super Tuesday, a total of 1,357 delegates are on offer.

The Republican primaries and caucuses are a formality because the incumbent, President Trump, is running for re-election.

The Democratic Party National Convention will be July 13–16 in Milwaukee. The Republican Party National Convention will be Aug. 24–27 in Charlotte, N.C. The general election will take place November 3.