Trump’s Chief Adviser on Homeland Security Resigns

WASHINGTON — The Trump administration announced another major departure from its senior ranks on Tuesday, with the resignation of Thomas P. Bossert as President Donald Trump’s chief adviser on homeland security.

Bossert’s resignation coincided with the arrival of John R. Bolton as the president’s national security adviser, and it was an unmistakable sign that Bolton is intent on naming his own people.

In a statement, the White House press secretary, Sarah Huckabee Sanders, said the president thanked Bossert, 43, “for his patriotic service and wishes him well.”

“The president is grateful for Tom’s commitment to the safety and security of our great country,” Sanders said. “Tom led the White House’s efforts to protect the homeland from terrorist threats, strengthen our cyber defenses, and respond to an unprecedented series of natural disasters.”

Bossert, who served in the George W. Bush administration, made a name for himself in the current White House as the public face of the administration’s response to hurricanes that tore through Texas, Florida and Puerto Rico.

But administration officials said he chafed at that part of his job, preferring to get involved in policy issues on counterterrorism and cyberwarfare.

Bossert, former colleagues said, aspired to a broader portfolio — even that of national security adviser — which was not in the cards. A White House official said Rob Joyce, a special assistant to the president and cybersecurity coordinator on the National Security Council, would take Bossert’s place on an acting basis.