Former President Donald Trump's indictment by a New York grand jury has thrust the nation into uncharted political, legal and historical waters, and raised a slew of questions about how the criminal case will unfold.

His then-lawyer, Michael Cohen, said he paid the porn star for her silence about an affair she says she had with Trump prior to the 2016 election.

Manhattan District Attorney Alvin Bragg's case against former President Donald Trump centers around payments made in 2016 ahead of the presidential election. Most of the key figures have been involved in grand jury testimony,

Sources told ABC News the Manhattan District Attorney’s office is also investigating a $150,000 payment to Playboy model Karen McDougal as part of the Trump case.

Donald Trump has become the first former president to be indicted in a criminal case after a grand jury investigation into hush money payments made on his behalf during the 2016 presidential campaign.

Ex-president is expected to appear for his arraignment on Tuesday where he will be fingerprinted, photographed and processed for arrest