Former US President Donald Trump is consulting lawyers as he faces criminal charges related to hush money paid to a porn star just before the 2016 election.
Mr Trump denies any wrongdoing and has been under investigation over a $130,000 wire transfer by his former attorney to the adult film star, Stormy Daniels.
Hush money agreements are not illegal, but the Manhattan prosecutor has been investigating whether business records were falsified in relation to the payment.
Mr Trump is expected to plead not guilty to the charges, which will be disclosed in full at the hearing on Tuesday
He is the first ex-US president to face a criminal case.
Extra security measures are in place with the authorities expecting protests outside the Manhattan court.
Mr Trump is expected to be released on bail and return to his Florida home, Mar-a-Lago, on Tuesday evening.
His 2024 White House campaign has raised over $8m since news of the charges against him broke last week, according to his team.
Georgia congresswoman Marjorie Taylor Greene plans to hold a pro-Trump rally near the court on Tuesday, but New York officials say they have not seen any influx of protesters to the city in recent days.