The investigation centres on $130,000 paid weeks before the 2016 polls to stop Stormy Daniels, whose real name is Stephanie Clifford, from going public about an affair she says she had with Trump years earlier.
Prosecutors are weighing whether to charge Trump in the case, and speculation is rife that an indictment is likely.
If the Manhattan district attorney were to indict Trump, the 76-year-old would become the first former president to be charged with a crime. That would also upend his bid to win the Republican nomination for the 2024 presidential election.
Trump’s lawyer told CNBC on Friday evening that his client would surrender to face criminal charges if he was indicted by a Manhattan grand jury.
Trump has denied having an affair with Daniels and has dismissed the investigation as politically motivated.
In his post, written in capital letters, Trump referred to “illegal leaks from a corrupt & highly political Manhattan district attorneys office” and said the investigation was “based on an old & fully debunked (by numerous other prosecutors!) fairy-tale.”
– Invitation to testify –
Daniels met with prosecutors on Wednesday and “agreed to make herself available as a witness, or for further inquiry if needed,” according to her lawyer Charles Brewster.
Earlier this month, Trump was given the opportunity to testify by District Attorney Alvin Bragg’s team but is expected to decline, to avoid potentially incriminating himself.
Experts say the invitation is a sign that he will almost certainly be charged.
On Monday, Trump’s former lawyer-turned-foe Michael Cohen testified before a grand jury in New York. The payment to Daniels was made by Cohen, who said he was later reimbursed.
The payment, if not properly accounted for, could result in a misdemeanour charge related to falsifying of business records. That might be raised to a felony if the false accounting was intended to cover up a second crime, such as a campaign finance violation, The New York Times has reported.
Trump is facing several criminal probes at state and federal level over possible wrongdoing before, during and after his first term in office that threaten his new run at the White House.
In Georgia, a prosecutor is investigating Trump and his allies’ efforts to overturn his 2020 election loss in the southern state. The grand jury in that case has recommended multiple indictments, the forewoman revealed last month.
The former president is also the subject of a federal probe into his handling of classified documents as well as his possible involvement in the January 6, 2021, assault on the US Capitol.