Trump’s Ex-Broker Says NY Probe Threatens Other Clients’ Privacy

A real-estate brokerage long used by Donald Trump said a subpoena issued as part of a New York probe into the former president’s business could force it to compromise other clients’ private information.

Cushman & Wakefieldis appealing an order to comply with the subpoena issued by New York Attorney General Letitia James. In court filings on Tuesday, the firm said the information sought by James’s office included confidential records of nearly 1,000 clients unrelated to the Trump Organization or to the probe.

James is investigating Trump’s use of potentially misleading asset valuations for financial gain. The attorney general ...