Michael Bloomberg has ended his bid for the White House after a poor showing on Super Tuesday.
“Three months ago, I entered the race for president to defeat Donald Trump. Today, I am leaving the race for the same reason,” he said in a statement.
Mr Bloomberg, a former mayor of New York City, has spent more than $500m (£390m) of his own money in the race to become the Democratic Party’s nominee.
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He said he would now support former Vice-President Joe Biden.
“I’ve always believed that defeating Donald Trump starts with uniting behind the candidate with the best shot to do it. After yesterday’s vote, it is clear that candidate is my friend and a great American, Joe Biden,” Mr Bloomberg said in his statement.
Out of the 14 states and territories which voted on Tuesday, the billionaire only managed to win in American Samoa.
Joe Biden won nine of the states, a remarkable rebound for his campaign.
The former US vice-president overturned predictions to narrowly take the key state of Texas from his main challenger, Bernie Sanders.
However, Mr Sanders is projected to win California – the biggest prize of the night – as well as three other states.
They lead the race to face Republican President Donald Trump in November.
Where did it go wrong?
Michael Bloomberg’s unconventional presidential campaign strategy of skipping the early states and spending heavily on Super Tuesday just ran head-first into cold, hard reality.
Key takeaways:
1) While most of the candidates in the race were liked by Democrats, Bloomberg was underwater. In Virginia, for instance, 56% of primary voters viewed him unfavourably. Hundreds of millions of dollars in slick television adverts and glossy mailers won’t do any good if voters don’t trust you.
2) Bloomberg spent $34m in television and radio advertisements in Alabama, North Carolina and Virginia, while Biden spent a fraction of that amount – and won all three. The early warning signs – empty campaign offices, sparsely attended voter canvassing events – turned out to be harbingers of doom.
3) He was surging in the polls just a few weeks ago. Then the Las Vegas debate, and his evisceration at the hands of Elizabeth Warren, happened. While many of the debates this campaign have had negligible effects, that one mattered.
What happens with the Democratic race now?
Super Tuesday awards more than 1,300 of the 1,991 delegates needed to win the Democratic White House nomination in July.
As things stand, Mr Biden has 402 delegates and Mr Sanders 314. However, results from California, which has 415 delegates, could affect the current standing.
Senator Elizabeth Warren, once the frontrunner in the race, suffered a humiliating defeat to Mr Biden in her home state of Massachusetts.
The next primaries take place on 10 March in Michigan, Washington state, Idaho, Mississippi, Missouri and North Dakota, with 352 delegates available.
The front-runners are hoping to clinch the nomination before the Democratic Convention in July.
