Ms Harris finds herself in a strong position for the Democratic nominee on Monday given endorsements from President Biden and Bill and Hillary Clinton.
But it is by no means certain she will lead the Democrats on Election Day
Full scale internal Democratic election processes cannot take place as Biden has already been chosen as the candidate, so contenders will have to put themselves forward at the Democratic National Convention in Chicago next month.
Let’s take a look at who they could be:
Rose to prominence during the Pandemic by criticising Trump’s handling of the crisis – then shot on to front pages when a plot was hatched by extremist Trump supporters to kidnap her.
Advocates greater gun control and cleaner energy, the very opposite of Trumpism.
Wife of former president Barack Obama
A graduate of Princeton and Harvard, she is known to the world because while working as a young lawyer was a colleague of future president Mr Obama. They have been married 32 years, and have two daughters.
She impressed many as First Lady – and her 2018 memoir, Becoming, has sold 11. 5m copies. Has not suggested she would stand.
Rated for his telegenic looks – but likely to face problems over the current condition of the ‘Golden State’. California faces budget problems, and distinctly un-telegenic images of crime, drug and homelessness problems in San Francisco and Los Angeles.
An impressive speaker who has won praise for his governorship of what is a key swing state – and, remarkably, one poll suggested more than a third of Trump supporters locally like him. Less well-known nationwide, he is a conservative Jew who keeps the Sabbath and follows a kosher diet.
He certainly defies the trend for elderly presidential candidates – and would also be the first openly gay man to occupy the White House. Graduated from Harvard, and was also, like former Democrat president Bill Clinton, a Rhodes Scholar at Oxford. Served in Afghanistan as an lieutenant in the US Navy reserve.
Known to millions around the world as a heart-throb film star, who has won an acting Oscar for his supporting role in Syriana, and another for co-producing Argo, he is also a leading Democrat supporter and fundraiser. Married to glamorous British human rights lawyer Amal. Has not suggested he would stand.
U.S. Senator from West Virginia
Reports emerged Sunday that the Democrat-turned-independent U.S. senator is considering reaffiliating with the Democratic Party to run for the nomination in November.
Earlier on the Sunday shows, Manchin made the rounds calling on Biden to end his reelection bid – but the moderate lawmaker insisted that the hosts stop asking him if he would run for President, saying: ‘Forget about me.’
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