Washington — White House homeland security adviser Tom Bossert is leaving the Trump administration, another departure during what has been a chaotic few months of personnel changes.

Bossert, a favorite of Chief of Staff John Kelly, is leaving one day after national security adviser John Bolton began the job. Bossert was believed to be on shaky footing in the Bolton era and he resigned two days after Michael Anton, the National Security Council spokesman, also quit.

Bossert’s resignation was requested by Bolton, according to two people familiar with the situation who requested anonymity to discuss internal personnel issues. Bolton himself conveyed that request to Bossert on Tuesday morning when Bossert walked into the office, the people said.

White House press secretary Sarah Huckabee Sanders declined to comment on whether Bossert was pushed out.

“I’m not going to get into specific details about the ongoings of personnel,” she said.