Asked about the investigation at a White House briefing, Mr. Trump called it a “continuation of the worst witch hunt in American history.”
“It’s a terrible thing that they do,” Mr. Trump said, referring to Democrats. “It’s really a terrible thing.”
Mr. Trump and Mr. Vance have been locked in battle over the subpoena for almost a year in a case that already has gone to the Supreme Court. The district attorney’s office has said that fight has slowed the investigation, and it remains unclear how much work prosecutors have been able to do in the interim or whether charges are likely to result.
It is also unknown whether prosecutors are investigating other possible crimes that were not suggested in the new filing.
Rebecca Roiphe, a former assistant district attorney in Manhattan who now teaches at New York Law School, said Mr. Vance’s decision to cite public accusations of wrongdoing allowed his office to defend its subpoena without revealing the actual focus of its investigation.
“They could be going on a totally different tangent,” Professor Roiphe said. “The prosecutor is just doing what he has to do in order to suggest this is a broad white-collar investigation, which generally justifies fairly broad subpoenas to financial institutions.”
Mr. Vance, a Democrat, subpoenaed Mr. Trump’s accounting firm, Mazars USA, in August 2019 for the tax returns and other financial records dating to 2011. Mr. Trump tried to block the subpoena almost immediately, initially arguing that as a sitting president, he was immune from state criminal investigation.