White House press secretary Sarah Sanders confirmed that Donald Trump’s homeland security adviser, Tom Bossert, resigned on Tuesday.

The White House statement did not include a reason why Bossert was leaving but stated that Trump is grateful for Tom’s commitment to the safety and security of their country.

Source: https://www.theguardian.com/us-news/2018/apr/10/tom-bossert-trump-homeland-security-adviser-resigns