On May 25, as former President Donald J. Trump was at the Saudi-backed LIV golf tournament at his course in Sterling, Va., one of his aides was photographed leaning toward him and dutifully adjusting the collar of his white pullover, a moment of closeness that had become routine for the pair.
The timing of the photograph was noteworthy: One day earlier, the aide, Walt Nauta, had been notified by the government that he was a target of a federal…