U.S. President Donald Trump's homeland security adviser, Tom Bossert, has resigned at the request of new national security adviser John Bolton, an administration official said on Tuesday, marking the latest departure from the White House of a senior adviser.
Bossert, a former deputy national security adviser to President George W. Bush, had overseen the administration's response to the Hurricane Maria disaster in Puerto Rico, as well as cybersecurity policy. An official said Bolton, who started his new role on Monday, urged Bossert's departure.
"The president is grateful for Tom's commitment to the safety and security of our great country," White House spokeswoman Sarah Sanders said in a statement.