McAleenan is also proud of having pushed DHS to declare unequivocally that white supremacists pose a growing threat to the American people, a statement the White House previously refused to make in as stark a way, the source close to the acting secretary said.
"Kevin now, after many years in Government, wants to spend more time with his family and go to the private sector", Trump tweeted shortly before taking the stage at a rally in Lake Charles, La.
President Trump tweeted "Congratulations Kevin, on a job well done!"
This is breaking news.
Germany must crack down on hate crimes, says Merkel
In the video, the man denies the Holocaust happened before launching into a misogynistic, antisemitic and xenophobic rant. German chancellor Angela Merkel joined a vigil held at Berlin's New Synagogue after the attack.
The president said on Twitter that Mr McAleenan has done an outstanding job and border crossings are down.
He was the fourth person to serve in the post since the Trump presidency began, CNN reported. "That's uncomfortable, as the accountable, senior figure".
Bennie Thompson, the Democratic chairman of the House Committee on Homeland Security, called McAleenan's exit an "ouster" and said Trump must urgently appoint a permanent replacement.
"He did his best as a professional public servant but those qualities are not prized in this administration", said Bersin, an assistant Homeland Security secretary for global affairs and Customs and Border Protection commissioner under Obama.
Rumour Has It: Manchester United consider Nagelsmann as next manager
Nagelsmann is now in his second job as head coach, with the United target starting his career as Hoffenheim manager aged just 28. AS suggest this is around €12m (because that is listed by Transfermarkt), yet that's clearly completely unrealistic.
McAleenan also took to Twitter to thank the president for allowing him to experience the opportunity for working for the Trump Administration. McAleenan was among several top officials who publicly backed Trump this year when he threatened tariffs against Mexico unless its government did more to stop the migrants. Trump told aides that McAleenan had the look he was going for, with the trim, stern demeanor of a federal agent.
McAleenan's exit ends a almost 20-year career in federal law enforcement. The Federal Vacancies Reform Act allows acting officials to service 210 days without a formal nomination, possibly longer pending a confirmation.
It was unclear whether McAleenan's departure was effective immediately.
Christopher Wilson, deputy director of the Wilson Center's Mexico Institute in Washington said people are questioning what McAleenan stands for, "questioning why he went along with the Trump administration and some of the things they did, but I believe he was a professional", he said.
MC Mary Kom Swells Record Medals Kitty at Boxing World Championships
Starting off slowly amid the cheers of Indian fans present at the quarter-final match in Ulan-Ude, Mary remained calm. This 365 days by myself, she gained gold medals at the India Beginning in Guwahati and President's Cup in Indonesia.
A new report from Physicians for Human Rights claims the Trump administration's policies for asylum seekers are inflicting trauma on migrants.