The New York prosecutors who are seeking President Trump’s tax records have also subpoenaed his longtime lender, a sign that their criminal investigation into Mr. Trump’s business practices is more wide-ranging than previously known.

The Manhattan district attorney’s office issued the subpoena last year to Deutsche Bank, which has been Mr. Trump’s primary lender since the late 1990s, seeking financial records that he and his company provided to the bank, according to four people familiar with the inquiry…

But in a court filing this week, prosecutors with the district attorney’s office cited “public reports of possibly extensive and protracted criminal conduct at the Trump Organization” and suggested that they were also investigating possible crimes involving bank and insurance fraud.