Nielsen, one person said, tried to explain the issues were complex and that the department's powers were limited by a slew of legal restrictions. She told the president her team was doing everything it could, but the president was left unconvinced.
The episode, first reported by The New York Times, left Nielsen on the verge of resignation, according to the paper, which also said Nielsen, the former deputy White House chief of staff, had drafted — but not submitted — a resignation letter.
But the department pushed back on that characterization.