Mr. Vance has assembled a grand jury and is in the process of determining whether to bring charges against Mr. Trump; the body has already questioned a number of the former president’s associates. Prosecutors have seized Mr. Weisselberg’s personal tax and financial records, as well as those of his daughter-in-law.
Letitia James, the New York attorney general, also opened a parallel investigation into whether the Trump Organization had manipulated property values to avoid taxes and gain other financial benefits. In May, Ms. James’s office announced that its investigation, which began as a civil concern, had expanded into the criminal realm and would join Mr. Vance’s inquiry.
The former president’s niece, the psychologist and author Mary Trump, has also sued him for fraud. Last year, she filed a suit claiming that Mr. Trump had defrauded her out of tens of millions of dollars. She had claimed that when her father, Fred Trump Jr., died, she was prevented from accessing her stake in his will, and that her share was slowly depleted by Donald Trump and other family members. After Fred Trump Sr. died, the remaining Trump siblings sought to exclude Mary from the family holdings entirely, she said.
She accepted a settlement in 2001, but after a 2018 Times investigation drew back the curtain on the family’s finances, she filed a lawsuit accusing her uncle and his siblings of fraud and breaching fiduciary trust. The suit is still pending.
The most high-profile lawsuit against Donald Trump may be the one brought by E. Jean Carroll, a journalist and advice columnist, whose 2019 book accuses him of raping her in the 1990s. After Mr. Trump publicly denied the allegation and said Ms. Carroll was “not my type,” she sued him for damaging her reputation and career.
When Mr. Trump was still in office, the Justice Department sought to stanch the lawsuit by arguing that he was legally protected from defamation suits filed over things he said while executing his duties as president. A federal judge ruled against the administration, but the agency’s lawyers appealed.