The 2024 race for the White House has only a handful of official candidates so far, with Democratic president Joe Biden yet to announce his plans and most Republican hopefuls still trying to decide whether to challenge former president Donald Trump.
Here is a list of major declared candidates and other potential 2024 hopefuls in both the Democratic and Republican parties.
Joe Biden
Mr Biden, 80, has been teasing his plans to seek a second term for months but has so far held off making an official announcement. He said on April 14th that he would announce "relatively soon".
Political analysts say there is little benefit to him jumping into the race too soon, with the election still 19 months away. In the meantime, he can continue to look presidential, although he still has poor approval ratings in opinion surveys. He does not face a serious threat from a Democratic challenger.
Donald Trump
Mr Trump, 76, announced his election campaign last November as he faced some of the loudest criticism yet from within his Republican Party over his support for far-right candidates who were defeated in the midterm elections.
Like Mr Biden, he remains unpopular with great swaths of the electorate. But he has retained an iron grip on his base and strengthened his standing in polls after he was indicted by New York prosecutors in connection with an alleged hush money payment to porn star Stormy Daniels. Mr Trump is the front-runner in the Republican race.
Ron DeSantis
The Florida governor, who has styled himself as Trump but without the drama that surrounds the former president, has yet to announce but has made all the traditional moves of a would-be presidential candidate.
Mr DeSantis, 44, who ranks second to Mr Trump in most polls, has signed bills imposing new restrictions on abortion and further loosening gun laws, positions that may help him in the Republican primaries but would likely hurt him among independent and more moderate voters in the general election.
His battle with Walt Disney Co over its Florida theme park has unnerved some donors, as has his mixed messaging on continued US support for Ukraine and reluctance to respond aggressively to Mr Trump's personal attacks.
Nikki Haley
A former governor of South Carolina and Mr Trump's ambassador to the United Nations, Ms Haley, 51, has emphasised her relative youth compared to Mr Biden and Mr Trump as well as her background as the daughter of two Indian immigrants.
Ms Haley has gained a reputation in the Republican Party as a solid conservative who has the ability to address issues of gender and race in a more credible fashion than many of her peers.
She has also pitched herself as a stalwart defender of American interests abroad. She attracts about 3 per cent support among Republican voters.
Tim Scott
The only Black Republican US senator has low name recognition outside his home state of South Carolina, but his optimism and focus on unifying his divided party has helped him draw a contrast with the more aggressive approach by Mr Trump and Mr DeSantis.
Mr Scott supporters, however, acknowledge that while his sunny demeanor is a selling point it may not be enough to defeat the front-runners, especially Mr DeSantis, who can point to a list of conservative legislative accomplishments. Mr Scott, 57, has launched a presidential exploratory committee but not yet confirmed he plans to run.
Asa Hutchinson
The former Arkansas governor launched his bid for the White House in April with a call for Mr Trump to step aside to deal with his indictment. Mr Hutchinson, 72, has touted his experience leading the deeply conservative state as proof he can deliver on policies Republican voters care about, citing tax cuts and job creation initiatives as particular sources of pride. Still, his name recognition remains limited outside Arkansas.
Mike Pence
Mr Trump's vice president has broken with his former boss over the 2021 attack by Trump supporters on the US Capitol, while Mr Pence was inside the building.
Mr Pence, 63, says "history will hold Trump accountable" for his role in the attack. However, Mr Pence, like other Republican White House hopefuls, came to Mr Trump's defence after New York prosecutors charged him in the hush money case, underscoring the fear of alienating Mr Trump's supporters in the primaries. Mr Pence has said he is still deciding whether to seek the Republican nomination.
Chris Christie
The pugnacious former New Jersey governor is reported to be mulling a possible campaign. Mr Christie, 60, who ran for president in 2016, is a one-time supporter of Mr Trump, but turned against him over the 2021 attack on the US Capitol.
Chris Sununu
The New Hampshire governor is also testing the waters of a presidential run. Mr Sununu, 48, who has served as governor of the small New England state since 2017, says the Republican Party needs new leadership, and he does not believe Mr Trump will be able to beat Biden.
Vivek Ramaswamy
A former biotechnology investor and executive, Mr Ramaswamy, 37, launched a firm in 2022 to pressure companies to abandon environmental, social and corporate governance (ESG) initiatives. He announced in February he was running for the Republican nomination. The political outsider has excited a lot of grassroots chatter as a potential alternative to Mr Trump, but he remains a long-shot candidate.
Robert F Kennedy Jr
An anti-vaccine activist, Mr Kennedy, 69, is making a long-shot bid to challenge Mr Biden for the Democratic nomination. He is the son of US Senator Robert F Kennedy, who was assassinated in 1968 during his own presidential bid.
Mr Kennedy has been banned from YouTube and Instagram for spreading misinformation about vaccines and the Covid-19 pandemic.
Mike Pompeo
Mr Trump's former secretary of state and director of the Central Intelligence Agency was seen as a potential contender, but he has decided not to run for personal reasons. The former Kansas congressman was one of Trump's most loyal lieutenants and initially backed his false claims of a stolen presidential election in 2020.
Glenn Youngkin
The hedge fund manager turned Virginia governor was also seen as a possible contender for the Republican nomination after he focused on parents' rights in schools in his gubernatorial campaign. Several of his key staff, though, have recently joined the DeSantis camp, however, suggesting that Mr Youngkin, is not going to run in 2024.
