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.

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,

Former President Donald Trump has been indicted by a Manhattan grand jury on criminal charges following an investigation into hush money payments made to porn star Stormy Daniels, according to prosecutors and defense attorneys.

The indictment marks the first time in American history that a U.S. president has been prosecuted on criminal charges.

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.