Donald Trump has declined an invitation to appear before a grand jury convened by the Manhattan District Attorney's Office, which is investigating a hush-money payment made to Stormy Daniels during his 2016 presidential campaign. A number of former Trump employees and White House staffers have been seen entering the district attorney's offices, and it is unclear whether Trump will face an indictment in the case. If he does, he would become the first former president in American history to be charged with a crime.