![Flashback: Trump once mocked President Obama for having "3 Chief of Staffs in less than 3 years" | Salon.com Flashback: Trump once mocked President Obama for having "3 Chief of Staffs in less than 3 years" | Salon.com](https://mediaproxy.salon.com/width/1200/https://media.salon.com/2018/12/ayers-trump-priebus-kelly.jpg)
Flashback: Trump once mocked President Obama for having "3 Chief of Staffs in less than 3 years" | Salon.com
![Former White House Chief of Staff Denis McDonough Addresses Politics, Climate Change, and Foreign Policy | NU News Former White House Chief of Staff Denis McDonough Addresses Politics, Climate Change, and Foreign Policy | NU News](https://news.niagara.edu/assets/news/_resampled/ScaleWidthWyIxMjAwIl0/McDonough2.jpg)
Former White House Chief of Staff Denis McDonough Addresses Politics, Climate Change, and Foreign Policy | NU News
![File:President Obama and Chief of Staff Denis McDonough often turns into a walk on the South Grounds of the White House.jpg - Wikimedia Commons File:President Obama and Chief of Staff Denis McDonough often turns into a walk on the South Grounds of the White House.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/3/38/President_Obama_and_Chief_of_Staff_Denis_McDonough_often_turns_into_a_walk_on_the_South_Grounds_of_the_White_House.jpg/1200px-President_Obama_and_Chief_of_Staff_Denis_McDonough_often_turns_into_a_walk_on_the_South_Grounds_of_the_White_House.jpg)
File:President Obama and Chief of Staff Denis McDonough often turns into a walk on the South Grounds of the White House.jpg - Wikimedia Commons
![President Obama with his Incoming and Outgoing Chiefs of Staff following the Personel Announcement | The White House President Obama with his Incoming and Outgoing Chiefs of Staff following the Personel Announcement | The White House](https://obamawhitehouse.archives.gov/sites/default/files/imagecache/gallery_img_full/image/image_file/president_obama_walks_with_his_outgoing_and_incoming_chiefs_of_staff_following_the_announcement.jpg?itok=W2yW7ksD)