U.S. Senator Kamala Harris, a former Democratic presidential candidate for 2020, said on Sunday that she would support her one-time rival Joe Biden's bid for the White House.
"I decided to support Joe Biden with great enthusiasm as President of the United States," she said in a recorded message on Twitter. "I really believe in him and have known him for a long time."
Biden was keen to capitalize on a series of victories in South Carolina and a number of states that voted last Tuesday, where support from one-time rivals Pete Buttigieg and Amy Klobuchar helped.
On Saturday in St. Louis, Biden thanked them and Harris' supporters and fueled speculation that the former Democratic presidential candidate might support him.
"We will unite this party and this country," said Biden.
Biden has to win a primary against Bernie Sanders to be the democratic candidate for Donald Trump in the November presidential election. Democrats in Michigan, Missouri and four other locations host nomination competitions on Tuesday.
Harris said she would advertise with Biden in Detroit, Michigan on Monday.
Harris, a first-time Senator for California and a former state attorney general, would have been the first woman and second black US president.
She was considered a top candidate when she started her presidency search at an Oakland rally attended by 20,000 people. She also drew attention to a clash with Biden in an early presidential debate. But their campaign ultimately struggled to build on early support and raise money.
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