Rosenstein spoke of possible secret Trump taping

Deputy Attorney General Rod Rosenstein speaks during a news conference on July 13 at the Department of Justice in Washington. (AP Photo/Evan Vucci, File)

WASHINGTON — Deputy Attorney General Rod Rosenstein discussed secretly recording President Donald Trump last year amid law enforcement concerns about chaos in the White House, according to people familiar with exchanges at the time. But one person who was present said Rosenstein was just being sarcastic.