Does anyone know the details or the outcome of the scandal in 1987 that caused Joe Bidden to stop his campaigning for the Democratic Presidential Nomination?

He stopped campaigning in 1987 before the first primaries due to the scandal, but nothing has been said about it, that I am aware of in this election. I can’t remember the details of it and I can’t find any reliable info on it. I’m not looking to bash him or any other candidate, I am trying to find information. Thanks!