Trump Said to Have Revealed Nuclear Submarine Secrets to Australian Businessman

Shortly after he left office, former President Donald J. Trump shared apparently classified information about American nuclear submarines with an Australian businessman during an evening of conversation at Mar-a-Lago, his private club and residence in Florida, according to two people familiar with the matter.

The businessman, Anthony Pratt, a billionaire member of Mar-a-Lago who runs one of the world’s largest cardboard companies, went on to share the sensitive details about the submarines with several others, the people said. Mr. Trump’s disclosures, they said, potentially endangered the U.S. nuclear fleet.