US President Joe Biden is set to host a record-breaking fundraiser in New York City, alongside his predecessors Barack Obama and Bill Clinton.
The gathering and concert will raise over $25m (£20m) for the Democrat's re-election campaign - the most ever for a single political event, says his team.
They are looking to extend a growing cash gap between the president and his Republican challenger Donald Trump.
Polls suggest the race for the White House rests on a knife edge.
Thursday's event at New York's Radio City Music Hall comes after a Biden campaign blitz in battleground states that could prove pivotal in November's vote.
The 81-year-old has been seeking to capitalise on momentum following his State of the Union Address earlier this month, which was well-received by Democrats.
However, the president's approval ratings remain persistently low.
Mr Trump is also in the New York area on Thursday, attending the wake of a police officer, Jonathan Diller, who was shot and killed in the line of duty.
The Biden campaign recently declared it had $155m cash to hand, which it said was the biggest war chest any Democratic candidate in history had possessed at this point in an election cycle.
Mr Trump and his political action committees reported having $74m.
Over 5,000 people are expected to attend the star-studded Democratic fundraiser on Thursday night, with many more watching online.
Late-night talk show host Stephen Colbert will moderate a conversation with the three presidents.
The event will be hosted by actress Mindy Kaling and feature musical performances from Lizzo, Queen Latifah and Lea Michele.
First Lady Jill Biden will host an after-party for 500 guests. The president's son, Hunter Biden, and his family are also attending.
The tickets are priced between $225 and half-a-million dollars. For $100,000, guests can get a picture with Mr Biden, Mr Obama and Mr Clinton, with star photographer Annie Leibovitz taking the snaps.
President Biden was joined on the Air Force One flight to New York by Mr Obama, who briefly came back for an off-the-record chat with reporters on the presidential jet.
The two men have remained close since Mr Obama left the White House, and are reported to speak regularly.
New York ground to a halt for their arrival as the two men's huge motorcade cut across Manhattan in the pouring rain as hundreds of onlookers jostled to take pictures.
Mr Biden's previous best single-day fundraising effort was the $10m he raised in 24 hours after his State of the Union address on 7 March.
His fundraising lead over Mr Trump - who is seeking a return to the White House four years after his presidency ended - has been boosted by the advantage of incumbency, experts say.
"Biden raising a lot of money is probably a function of him not having any real primary challengers," Joseph Campbell, a communications professor at American University, told the BBC. "There's no competition for Democratic donor money."
Mr Trump's campaign and his joint fundraising committee brought in $20m in the whole of February, less than what the Biden campaign expects to receive just from Thursday's event.
In addition to Mr Trump's fundraising challenges, his campaign and political action committees have had to spend millions of dollars in legal fees fighting the criminal and civil cases against him.
Mr Trump, 77, blasted the Democratic fundraising event in a fundraising email of his own, sent out by his campaign on Thursday morning.
"Hundreds of deranged Hollywood liberals will be in attendance, and they will open their wallets to fund the destruction of country!" the message said.
Latest Stories
-
Director urges parents to protect children from abuse
16 mins -
Imani-Ghana criticises Akufo-Addo for not lauding Fourth Estate’s contribution to social development
24 mins -
Man remanded for allegedly stabbing businessman with broken bottle and screwdriver
49 mins -
Population in Kumasi Central Prison surges to 1800, threefold exceeding capacity
59 mins -
NPP to conduct La Dadekotopon parliamentary primary today
59 mins -
KPMG’s report on GRA and SML deal, government white paper on report and matters arising
59 mins -
I won’t reply to Chris Brown tour criticism – Ayra Star
1 hour -
British Columbia to back off drug decriminalisation project
1 hour -
Veteran commentator Joe Lartey Sr dies at 96
1 hour -
Livestream: Newsfile discusses KPMG report on SML deal, ILO on SSNIT reserves and NDC’s running mate
2 hours -
Ghanaian activist hugs over 1,100 trees in an hour to set Guinness World Records
2 hours -
Mathew Anim Cudjoe’s Dundee United promoted to Scottish Premiership after Championship win
2 hours -
NSMQ star Jochebed Adwoa Sutherland sweeps 12 awards at UG Vice-Chancellor’s Ceremony
3 hours -
Ghana’s Education Quality ranked 125 out of 183 countries in latest Global Youth Development Index
3 hours -
Emma Stone wants people to use her real first name
3 hours