You may not need political experience to work in this White House, but a background in MMA could be helpful. On Feb. 21, the same day families of Marjory Stoneman Douglas High School shooting victims were visiting with President Trump, White House Chief of Staff John Kelly and Corey Lewandowski, Trump's first campaign manager, got into a physical altercation, six people with knowledge of the scuffle told The New York Times on Monday.