Officials in New York and Washington, DC, are preparing for potential protests as a grand jury empaneled as part of the investigation into Donald Trump's alleged role in a scheme to pay hush money to adult film star Stormy Daniels continues to weigh possible charges.

Robert Costello said he told the grand jury Cohen essentially acted alone in paying Stormy Daniels. Cohen disputed the account on MSNBC, saying Costello has his "facts twisted."

The former president is expected to be indicted soon by a grand jury for his role in a hush money payment made to porn star Stormy Daniels on the eve of the 2016 election.

Donald Trump could be indicted​ in New York. Here's how the criminal investigation unfolded, dating back to ​his alleged affair with Stormy Daniels.

The grand jury empaneled as part of the investigation into Donald Trump's alleged role in a scheme to pay hush money to adult film star Stormy Daniels on Monday heard from a potentially key witness put forward by the former president's legal team.

Robert J Costello, scheduled to appear before New York grand jury on Monday, likely to question Trump accuser’s credibility

If prosecutors charge Mr Trump, it would be the first criminal case ever brought against a former US president. The grand jury, which has been set up by a Manhattan prosecutor to determine whether there is enough evidence to indict Mr Trump,