WASHINGTON — An audio recording from a meeting in which former President Donald Trump discusses a “highly confidential” document with an interviewer appears to undermine his later claim that he didn’t have such documents, only magazine and newspaper clippings. The recording, from a July 2021 interview Trump gave at his Bedminster, New Jersey, resort for people working on the memoir of his former chief of staff Mark Meadows, is a critical piece of evidence in special counsel Jack Smith’s indictment of Trump over the mishandling of classified information. The special counsel’s indictment alleges that those in attendance at the meeting with Trump — including a writer, a publisher and two of Trump’s staff members — were shown classified information about a Pentagon plan of attack on an unspecified foreign country. “These are the papers,” Trump says in a moment that seems to indicate he’s holding a secret Pentagon document with plans to attack Iran.