Bernie sanders
Sanders endorses ex-rival Biden for US president
The swift backing marked a notable change from 2016, when Sanders lost the presidential nomination race to Hillary Clinton but delayed endorsing her candidacy.
Sanders was holding a staff conference call on Wednesday when he "announced that he is suspending his campaign for president," his aides said in a statement.
CNN and NBC both projected the 77-year-old centrist former vice president as the winner in Arizona over the 78-year-old leftist senator from Vermont.
Bernie Sanders said he would 'in all likelihood' do the same, following the most diverse nomination contest in US history that saw no fewer than six women in the running to take on Donald Trump in November.
Speculation had been growing that he might respond to pleas from Democratic activists to step aside, giving Joe Biden a chance to focus fully on campaigning against Donald Trump.
Warren's withdrawal makes the Democratic race effectively a two-man contest between Biden, the 77-year-old former vice president, and Sanders, the 78-year-old Vermont senator.
President Donald Trump hailed the "incredible comeback" of the 77-year-old former vice president in the Super Tuesday contests.
Edison Research and the main television networks declared Biden the winner in Virginia, North Carolina, Tennessee, and Alabama based on exit polls on Super Tuesday.
The western state sends 67 delegates to the party's convention and is Sanders' second win after his home state of Vermont.
The 78-year-old hit back at the charge his policies were too "radical," insisting such ideas "exist in countries all over the world," including the notion that health care is a human right.
A representative for the state party said the campaigns understood how the reporting process would work before Saturday.
The self-described democratic socialist’s triumph on Saturday left all of his rivals contending they were best positioned to curb his momentum
Bernie Sanders, 78, who represents neighboring Vermont in the Senate, won New Hampshire easily over rival Hillary Clinton with 60% of the vote in his unsuccessful bid for the party’s nomination four years ago.
In a heated debate in New Hampshire just four days before the state’s pivotal primary, their Democratic rivals questioned whether Sanders’ democratic socialist views and Buttigieg’s relative lack of experience made them too much of a risk for the 3 November election.
Clinton also refused to say whether she would endorse and campaign for Sanders if he becomes the Democrats' choice to take on President Donald Trump in November's election.
Cardi B revealed on social media last week she was keen to make a career for herself in politics, because she really loves the idea of government, even though she is not a supporter of President Donald Trump or his Republican administration.
With Washington's conflict with Iran as the backdrop, the six candidates seeking to make their best case against President Donald Trump and tangled over who has the best judgment on foreign policy.
Joe Biden was sharper and more aggressive than in either of the first two debates, when he came under frequent attack for his record on race and criminal justice during his long tenure in the US Senate.
The unlikely duo met at a nail salon in Detroit to film a campaign video aimed at younger voters.