Former US Vice President Joe Biden has won eight of the 14 states that voted to choose the Democratic nominee for the US presidential election later this year.
The former U.S. vice president won in Massachusetts, Minnesota, Oklahoma, Arkansas, Alabama, Tennessee, North Carolina and Virginia.
But Senator Bernie Sanders is projected to win in California and three other states.
They lead the race to face Republican President Donald Trump in November.
Former New York Mayor Michael Bloomberg spent more than half a billion dollars on his campaign but did not win a single state.